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Swami V, Tran US, Stieger S, Aavik T, Ranjbar HA, Adebayo SO, Afhami R, Ahmed O, Aimé A, Akel M, Halbusi HA, Alexias G, Ali KF, Alp-Dal N, Alsalhani AB, Álvares-Solas S, Amaral ACS, Andrianto S, Aspden T, Argyrides M, Aruta JJBR, Atkin S, Ayandele O, Baceviciene M, Bahbouh R, Ballesio A, Barron D, Bellard A, Bender SS, Beydağ KD, Birovljević G, Blackburn MÈ, Borja-Alvarez T, Borowiec J, Bozogáňová M, Bratland-Sanda S, Browning MHEM, Brytek-Matera A, Burakova M, Çakır-Koçak Y, Camacho P, Camilleri VE, Cazzato V, Cerea S, Chaiwutikornwanich A, Chaleeraktrakoon T, Chambers T, Chen QW, Chen X, Chien CL, Chobthamkit P, Choompunuch B, Compte EJ, Corrigan J, Cosmas G, Cowden RG, Czepczor-Bernat K, Czub M, da Silva WR, Dadfar M, Dalley SE, Dany L, Datu JAD, Berbert de Carvalho PH, Coelho GLDH, De Jesus AOS, Debbabi SH, Dhakal S, Di Bernardo F, Dimitrova DD, Dion J, Dixson B, Donofrio SM, Drysch M, Du H, Dzhambov AM, El-Jor C, Enea V, Eskin M, Farbod F, Farrugia L, Fian L, Fisher ML, Folwarczny M, Frederick DA, Fuller-Tyszkiewicz M, Furnham A, García AA, Geller S, Ghisi M, Ghorbani A, Martinez MAG, Gradidge S, Graf S, Grano C, Gyene G, Hallit S, Hamdan M, Handelzalts JE, Hanel PHP, Hawks SR, Hekmati I, Helmy M, Hill T, Hina F, Holenweger G, Hřebíčková M, Ijabadeniyi OA, Imam A, İnce B, Irrazabal N, Jankauskiene R, Jiang DY, Jiménez-Borja M, Jiménez-Borja V, Johnson EM, Jovanović V, Jović M, Jović M, Junqueira ACP, Kahle LM, Kantanista A, Karakiraz A, Karkin AN, Kasten E, Khatib S, Khieowan N, Kimong PJ, Kiropoulos L, Knittel J, Kohli N, Koprivnik M, Kospakov A, Król-Zielińska M, Krug I, Kuan G, Kueh YC, Kujan O, Kukić M, Kumar S, Kumar V, Lamba N, Lauri MA, Laus MF, LeBlanc LA, Lee HJ, Lipowska M, Lipowski M, Lombardo C, Lukács A, Maïano C, Malik S, Manjary M, Baldó LM, Martinez-Banfi M, Massar K, Matera C, McAnirlin O, Mebarak MR, Mechri A, Meireles JFF, Mesko N, Mills J, Miyairi M, Modi R, Modrzejewska A, Modrzejewska J, Mulgrew KE, Myers TA, Namatame H, Nassani MZ, Nerini A, Neto F, Neto J, Neves AN, Ng SK, Nithiya D, O J, Obeid S, Oda-Montecinos C, Olapegba PO, Olonisakin TT, Omar SS, Örlygsdóttir B, Özsoy E, Otterbring T, Pahl S, Panasiti MS, Park Y, Patwary MM, Pethö T, Petrova N, Pietschnig J, Pourmahmoud S, Prabhu VG, Poštuvan V, Prokop P, Ramseyer Winter VL, Razmus M, Ru T, Rupar M, Sahlan RN, Hassan MS, Šalov A, Sapkota S, Sarfo JO, Sawamiya Y, Schaefer K, Schulte-Mecklenbeck M, Seekis V, Selvi K, Sharifi M, Shrivastava A, Siddique RF, Sigurdsson V, Silkane V, Šimunić A, Singh G, Slezáčková A, Sundgot-Borgen C, Ten Hoor G, Tevichapong P, Tipandjan A, Todd J, Togas C, Tonini F, Tovar-Castro JC, Trangsrud LKJ, Tripathi P, Tudorel O, Tylka TL, Uyzbayeva A, Vally Z, Vanags E, Vega LD, Vicente-Arruebarrena A, Vidal-Mollón J, Vilar R, Villegas H, Vintilă M, Wallner C, White MP, Whitebridge S, Windhager S, Wong KY, Yau EK, Yamamiya Y, Yeung VWL, Zanetti MC, Zawisza M, Zeeni N, Zvaríková M, Voracek M. Body appreciation around the world: Measurement invariance of the Body Appreciation Scale-2 (BAS-2) across 65 nations, 40 languages, gender identities, and age. Body Image 2023; 46:449-466. [PMID: 37582318 DOI: 10.1016/j.bodyim.2023.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/17/2023]
Abstract
The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset - with data collected between 2020 and 2022 - to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups. Multi-group confirmatory factor analysis indicated that full scalar invariance was upheld across all nations, languages, gender identities, and age groups, suggesting that the unidimensional BAS-2 model has widespread applicability. There were large differences across nations and languages in latent body appreciation, while differences across gender identities and age groups were negligible-to-small. Additionally, greater body appreciation was significantly associated with higher life satisfaction, being single (versus being married or in a committed relationship), and greater rurality (versus urbanicity). Across a subset of nations where nation-level data were available, greater body appreciation was also significantly associated with greater cultural distance from the United States and greater relative income inequality. These findings suggest that the BAS-2 likely captures a near-universal conceptualisation of the body appreciation construct, which should facilitate further cross-cultural research.
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Affiliation(s)
- Viren Swami
- School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, United Kingdom; Centre for Psychological Medicine, Perdana University, Kuala Lumpur, Malaysia.
| | - Ulrich S Tran
- Department of Cognition, Emotion, and Methods in Psychology, Faculty of Psychology, University of Vienna, Vienna, Austria
| | - Stefan Stieger
- Department of Psychology and Psychodynamics, Karl Landsteiner University of Health Sciences, Krems an der Donau, Austria
| | - Toivo Aavik
- Institute of Psychology, University of Tartu, Tartu, Estonia
| | | | | | - Reza Afhami
- Department of Art Studies, Tarbiat Modares University, Tehran, Iran
| | - Oli Ahmed
- Department of Psychology, University of Chittagong, Chattogram, Bangladesh
| | - Annie Aimé
- Department of Psychoeducation and Psychology, Université du Québec en Outaouais, Saint-Jérôme, Canada
| | - Marwan Akel
- INSPECT-LB: National Institute of Public Health, Clinical Epidemiology, and Toxicology, Beirut, Lebanon; School of Pharmacy, Lebanese International University, Beirut, Lebanon
| | - Hussam Al Halbusi
- Department of Management, Ahmed Bin Mohammad Military College, Doha, Qatar
| | - George Alexias
- Faculty of Psychology, Panteion University of Social and Political Sciences, Athens, Greece
| | - Khawla F Ali
- Royal College of Surgeons Ireland-Bahrain, Adliya, Bahrain
| | - Nursel Alp-Dal
- Department of Midwifery, Faculty of Health Sciences, Munzur University, Tunceli, Turkiya
| | - Anas B Alsalhani
- Department of Oral Medicine and Diagnostic Sciences, Vision College of Dentistry and Nursing, Vision Colleges, Riyadh, Saudi Arabia
| | - Sara Álvares-Solas
- Facultad de Ciencias de la Vida, Universidad Regional Amazónica Ikiam, Muyuna, Ecuador
| | | | - Sonny Andrianto
- Department of Psychology, Universitas Islam Indonesia, Yogyakarta, Indonesia
| | - Trefor Aspden
- Department of Psychology, Aberystwyth University, Ceredigion, United Kingdom
| | - Marios Argyrides
- Department of Psychology, Neapolis University Pafos, Paphos, Cyprus
| | | | - Stephen Atkin
- Royal College of Surgeons Ireland-Bahrain, Adliya, Bahrain
| | - Olusola Ayandele
- Department of General Studies, The Polytechnic, Ibadan, Nigeria; Department of Psychology, University of Ibadan, Ibadan, Nigeria
| | - Migle Baceviciene
- Health Research and Innovation Science Centre, Faculty of Health Sciences, Klaipeda University, Klaipeda, Lithuania
| | - Radvan Bahbouh
- Department of Psychology, Faculty of Arts, Charles University, Prague, Czechia
| | - Andrea Ballesio
- Department of Psychology, Sapienza University of Rome, Rome, Italy
| | - David Barron
- School of Social Sciences, Heriot-Watt University Malaysia, Putrajaya, Malaysia
| | - Ashleigh Bellard
- School of Psychology, Faculty of Health, Liverpool John Moores University, Liverpool, United Kingdom
| | | | - Kerime Derya Beydağ
- Department of Nursing, Faculty of Health Sciences, Istanbul Gedik University, Istanbul, Turkiye
| | - Gorana Birovljević
- Department of Psychology, Faculty of Humanities and Social Sciences, University of Rijeka, Rijeka, Croatia
| | | | - Teresita Borja-Alvarez
- Colegio de Ciencias Sociales y Humanidades, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Joanna Borowiec
- Department of Physical Education and Lifelong Sports, Poznań University of Physical Education, Poznań, Poland
| | - Miroslava Bozogáňová
- Institute of Social Sciences of the Centre of Social and Psychological Sciences, Košice, Slovakia; Faculty of Humanities and Natural Sciences, Institute of Pedagogy, Andragogy, and Psychology, University of Prešov, Prešov, Slovakia
| | - Solfrid Bratland-Sanda
- Department of Sports, Physical Education and Outdoor Studies, University of South-Eastern Norway, Bø, Telemark, Norway
| | - Matthew H E M Browning
- Department of Parks, Recreation and Tourism Management, Clemson University, Clemson, United States of America
| | | | - Marina Burakova
- Laboratory of Social Psychology, Aix-Marseille University, Aix-en-Provence, France
| | - Yeliz Çakır-Koçak
- Department of Midwifery, Faculty of Health Sciences, Bartın University, Bartın, Turkiye
| | | | | | - Valentina Cazzato
- School of Psychology, Faculty of Health, Liverpool John Moores University, Liverpool, United Kingdom
| | - Silvia Cerea
- Department of General Psychology, University of Padova, Padova, Italy; Department of Biomedical Sciences, University of Padova, Padova, Italy
| | | | - Trawin Chaleeraktrakoon
- Department of Psychology, Faculty of Liberal Arts, Thammasat University, Pathumthani, Thailand
| | - Tim Chambers
- School of Psychology, Deakin University, Geelong, Australia
| | - Qing-Wei Chen
- Lab of Light and Physio-Psychological Health, National Center for International Research on Green Optoelectrics, South China Normal University, Guangzhou, China; Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
| | - Xin Chen
- Department of Psychology, Graduate School of Arts and Science, New York University, New York, United States of America
| | - Chin-Lung Chien
- Department of Psychology, Soochow University, Taipei, Taiwan
| | | | - Bovornpot Choompunuch
- Department of Educational Psychology and Guidance, Faculty of Education, Mahasarakham University, Maha Sarakham, Thailand
| | - Emilio J Compte
- School of Psychology, Universidad Adolfo Ibáñez, Penalolen, Chile; Comenzar de Nuevo Treatment Center, Monterrey, Mexico
| | - Jennifer Corrigan
- School of Applied Psychology, University College Cork, Cork, Ireland
| | - Getrude Cosmas
- Faculty of Psychology and Education, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Richard G Cowden
- Human Flourishing Program, Harvard University, Cambridge, United States of America
| | - Kamila Czepczor-Bernat
- Department of Pediatrics, Pediatric Obesity and Metabolic Bone Diseases, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland
| | - Marcin Czub
- Institute of Psychology, University of Wrocław, Wrocław, Poland
| | - Wanderson Roberto da Silva
- Graduate Program in Food, Nutrition, and Food Engineering, São Paulo State University, São Paulo, Brazil
| | - Mahboubeh Dadfar
- Department of Addiction, School of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry), Iran University of Medical Sciences, Tehran, Iran
| | - Simon E Dalley
- Department of Psychology, University of Groningen, Groningen, The Netherlands
| | - Lionel Dany
- Laboratory of Social Psychology, Aix-Marseille University, Aix-en-Provence, France
| | - Jesus Alfonso D Datu
- Teacher Education and Learning Leadership Academic Unit, Faculty of Education. The University of Hong Kong, Hong Kong, China
| | - Pedro Henrique Berbert de Carvalho
- Body Image and Eating Disorders Research Group, Federal University of Juiz de Fora, Juiz de Fora, Brazil; Institute of Psychiatry, University of São Paulo, São Paulo, Brazil
| | | | | | | | - Sandesh Dhakal
- Central Department of Psychology, Tribhuvan University, Kathmandu, Nepal
| | | | - Donka D Dimitrova
- Department of Health Management and Healthcare Economics, Faculty of Public Health, Medical University of Plovdiv, Plovdiv, Bulgaria
| | - Jacinthe Dion
- Department of Psychology, Université du Québec à Trois-Rivières, Trois-Rivières, Canada
| | - Barnaby Dixson
- School of Health, University of the Sunshine Coast, Moreton Bay, Australia
| | - Stacey M Donofrio
- Department of Psychology, University of Groningen, Groningen, The Netherlands
| | - Marius Drysch
- Department of Plastic and Hand Surgery, BG University Hospital Bergmannsheil Bochum, Ruhr University Bochum, Bochum, Germany
| | - Hongfei Du
- Institute of Advanced Studies in Humanities and Social Sciences, Beijing Normal University, Zhuhai, China
| | - Angel M Dzhambov
- Department of Hygiene, Faculty of Public Health, Medical University of Plovdiv, Plovdiv, Bulgaria
| | - Claire El-Jor
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Beirut, Lebanon
| | - Violeta Enea
- Department of Psychology, Alexandru Ioan Cuza University, Iași, Romania
| | - Mehmet Eskin
- Department of Psychology, Koc University, Istanbul, Turkiye
| | - Farinaz Farbod
- Department of Textile and Fashion Design, Alzahra University, Tehran, Iran
| | | | - Leonie Fian
- Department of Cognition, Emotion, and Methods in Psychology, Faculty of Psychology, University of Vienna, Vienna, Austria
| | | | - Michał Folwarczny
- Discipline of Marketing, J.E. Cairnes School of Business & Economics, University of Galway, Galway, Ireland
| | - David A Frederick
- Crean College of Health and Behavioral Sciences, Chapman University, Orange, United States of America
| | | | - Adrian Furnham
- Department of Leadership and Organizational Behaviour, Norwegian Business School, Oslo, Norway
| | | | - Shulamit Geller
- School of Behavioral Sciences, The Academic College of Tel Aviv-Yaffo, Tel Aviv-Yafo, Israel
| | - Marta Ghisi
- Department of General Psychology, University of Padova, Padova, Italy; Unità Operativa Complessa (UOC) Hospital Psychology, Padova University Hospital, Padova, Italy
| | - Alireza Ghorbani
- Department of Social Sciences, Payam Noor University, Tehran, Iran
| | | | - Sarah Gradidge
- School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, United Kingdom
| | - Sylvie Graf
- Institute of Psychology, Czech Academy of Sciences, Prague, Czechia
| | - Caterina Grano
- Department of Psychology, Sapienza University of Rome, Rome, Italy
| | - Gyöngyvér Gyene
- Doctoral School of Psychology, Eötvös Loránd University, Budapest, Hungary
| | - Souheil Hallit
- School of Medicine and Medical Sciences, Holy Spirit University of Kaslik, Jounieh, Lebanon; Applied Science Research Center, Applied Science Private University, Amman 11931, Jordan
| | - Motasem Hamdan
- Faculty of Public Health, Al-Quds University, East Jerusalem, Palestine
| | - Jonathan E Handelzalts
- School of Behavioral Sciences, The Academic College of Tel Aviv-Yaffo, Tel Aviv-Yafo, Israel; Department of Psychiatry, University of Michigan, Ann Arbor, United States of America
| | - Paul H P Hanel
- Department of Psychology, University of Essex, Colchester, United Kingdom
| | - Steven R Hawks
- Department of Kinesiology and Health Science, Utah State University, Logan, UnitedStates of America
| | - Issa Hekmati
- Department of Psychology, Faculty of Human Science, University of Maragheh, Maragheh, Iran
| | - Mai Helmy
- Department of Psychology, College of Education, Sultan Qaboos University, Muscat, Oman; Department of Psychology, Faculty of Arts, Menoufia University, Shebin el Kom, Egypt
| | - Tetiana Hill
- Hertfordshire Business School, University of Hertfordshire, Hatfield, United Kingdom
| | - Farah Hina
- Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
| | | | | | | | - Asma Imam
- Faculty of Public Health, Al-Quds University, East Jerusalem, Palestine
| | - Başak İnce
- Centre for Research in Eating and Weight Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, United Kingdom
| | - Natalia Irrazabal
- Faculty of Social Sciences, University of Palermo, Buenos Aires, Argentina
| | - Rasa Jankauskiene
- Health Research and Innovation Science Centre, Faculty of Health Sciences, Klaipeda University, Klaipeda, Lithuania
| | - Ding-Yu Jiang
- Department of Psychology, National Chung Cheng University, Chia Yi, Taiwan
| | - Micaela Jiménez-Borja
- Colegio de Ciencias Sociales y Humanidades, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Verónica Jiménez-Borja
- Colegio de Comunicación y Artes Contemporáneas, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Evan M Johnson
- Crean College of Health and Behavioral Sciences, Chapman University, Orange, United States of America
| | - Veljko Jovanović
- Department of Psychology, University of Novi Sad, Novi Sad, Serbia
| | - Marija Jović
- Faculty of Organizational Sciences, University of Belgrade, Belgrade, Serbia
| | - Marko Jović
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Alessandra Costa Pereira Junqueira
- Department of Psychology, University of São Paulo, Ribeirão Preto, Brazil; Department of Nutrition, University of Ribeirão Preto, Ribeirão Preto, Brazil
| | - Lisa-Marie Kahle
- Faculty of Life Sciences, Medical School Hamburg, Hamburg, Germany
| | - Adam Kantanista
- Department of Physical Education and Lifelong Sports, Poznań University of Physical Education, Poznań, Poland
| | - Ahmet Karakiraz
- Sakarya Business School, Sakarya University, Sakarya, Turkiye
| | | | - Erich Kasten
- Faculty of Life Sciences, Medical School Hamburg, Hamburg, Germany
| | - Salam Khatib
- Faculty of Health Professions, Al-Quds University, East Jerusalem, Palestine
| | - Nuannut Khieowan
- Asian Studies Department, Faculty of International Studies, Prince of Songkla University Phuket Campus, Phuket, Thailand
| | | | - Litza Kiropoulos
- School of Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Joshua Knittel
- Department of Consumer Behavior, University of Bern, Bern, Switzerland
| | - Neena Kohli
- Department of Psychology, University of Allahabad, Prayagraj, India
| | - Mirjam Koprivnik
- Institute of Anton Martin Slomsek, Primary School Montessori, Maribor, Slovenia
| | - Aituar Kospakov
- Department of Sociology and Social Work, Al-Farabi Kazakh National University, Almaty, Kazakhstan; Department of General Education Disciplines, Astana IT University, Astana, Kazakhstan
| | - Magdalena Król-Zielińska
- Department of Physical Education and Lifelong Sports, Poznań University of Physical Education, Poznań, Poland
| | - Isabel Krug
- School of Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Garry Kuan
- Exercise and Sport Sciences, School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - Yee Cheng Kueh
- Biostatics and Research Methods Unit, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - Omar Kujan
- Oral Diagnostics and Surgical Sciences, UWA Dental School, The University of Western Australia, Nedlands, Australia
| | - Miljana Kukić
- Department of Psychology, Faculty of Humanities and Social Sciences, University of Rijeka, Rijeka, Croatia
| | - Sanjay Kumar
- Department of Psychology, D.A.V. College, Muzaffarnagar, India
| | - Vipul Kumar
- Department of Psychology, Kashi Naresh Government Post-Graduate College, Gyanpur, India
| | - Nishtha Lamba
- Department of Psychology, Middlesex University Dubai, Dubai, United Arab Emirates
| | | | - Maria Fernanda Laus
- Department of Psychology, University of São Paulo, Ribeirão Preto, Brazil; Department of Nutrition, University of Ribeirão Preto, Ribeirão Preto, Brazil
| | | | - Hyejoo J Lee
- Department of Counselling Psychology and Social Welfare, Handong Global University, Pohang, South Korea
| | | | - Mariusz Lipowski
- Faculty of Social and Humanities, University WSB Merito, Gdansk, Poland
| | | | - Andrea Lukács
- Faculty of Health Care, University of Miskolc, Miskolc, Hungary
| | - Christophe Maïano
- Department of Psychoeducation and Psychology, Université du Québec en Outaouais, Saint-Jérôme, Canada; Cyberpsychology Laboratory, Department of Psychoeducation and Psychology, Université du Québec en Outaouais (UQO), Saint-Jérôme, Canada
| | - Sadia Malik
- Department of Psychology, University of Sargodha, Sargodha, Pakistan
| | - Mandar Manjary
- Department of Psychology, D.A.V. College, Muzaffarnagar, India; M.M.D. Public School, Brahmpuri, Muzaffarnagar, India
| | - Lidia Márquez Baldó
- Department of Research Methods and Diagnosis in Education, University of València, València, Spain
| | - Martha Martinez-Banfi
- Faculty of Legal and Social Sciences, Simón Bolívar University, Barranquilla, Colombia; Life Science Research Centre, Simón Bolívar University, Barranquilla, Colombia
| | - Karlijn Massar
- Department of Work and Social Psychology, Maastricht University, Maastricht, the Netherlands
| | - Camila Matera
- Department of Education, Languages, Intercultures, Literatures, and Psychology, University of Florence, Florence, Italy
| | - Olivia McAnirlin
- Department of Parks, Recreation and Tourism Management, Clemson University, Clemson, United States of America
| | | | - Anwar Mechri
- Faculty of Medicine of Monastir, Eya Medical Centre, Monastir, Tunisia
| | | | - Norbert Mesko
- Institute of Psychology, University of Pécs, Pécs, Hungary
| | | | - Maya Miyairi
- Department of Health Sciences, DePaul University, Chicago, United States of America
| | - Ritu Modi
- Department of Psychology, University of Allahabad, Prayagraj, India
| | - Adriana Modrzejewska
- Department of Psychology, School of Health Sciences in Katowice, Medical University of Silesia, Katowice, Poland
| | | | - Kate E Mulgrew
- School of Health, University of the Sunshine Coast, Moreton Bay, Australia
| | - Taryn A Myers
- Department of Psychology, Virginia Wesleyan University, Virginia Beach, United States of America
| | - Hikari Namatame
- Faculty of Human Sciences, University of Tsukuba, Tsukuba, Japan
| | - Mohammad Zakaria Nassani
- Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia
| | - Amanda Nerini
- Department of Education, Languages, Intercultures, Literatures, and Psychology, University of Florence, Florence, Italy
| | - Félix Neto
- Department of Psychology, University of Porto, Porto, Portugal
| | - Joana Neto
- Research Center in Business Sciences and Tourism of Consuelo Vieira da Costa Foundation (CICET-FCVC), Porto, Portugal
| | - Angela Noguiera Neves
- Division of Research, Physical Education College of the Brazilian Army, Rio de Janeiro, Brazil
| | - Siu-Kuen Ng
- Physical Education Unit, Chinese University of Hong Kong, Hong Kong, China
| | - Devi Nithiya
- Department of Physiology, Mahatma Gandhi Medical College and Research Institute, Puducherry, India
| | - Jiaqing O
- Department of Psychology, Aberystwyth University, Ceredigion, United Kingdom
| | - Sahar Obeid
- Social and Education Sciences Department, School of Arts and Sciences, Lebanese American University, Jbeil, Lebanon
| | | | | | | | - Salma Samir Omar
- Department of Dermatology, Venereology, and Andrology, Alexandria University, Alexandria, Egypt
| | | | - Emrah Özsoy
- Sakarya Business School, Sakarya University, Sakarya, Turkiye
| | | | - Sabine Pahl
- Department of Cognition, Emotion, and Methods in Psychology, Faculty of Psychology, University of Vienna, Vienna, Austria
| | - Maria Serena Panasiti
- Santa Lucia Foundation, Scientific Institute for Research and Healthcare, Rome, Italy
| | - Yonguk Park
- Department of Psychology, Yonsei University, Seoul, South Korea
| | - Muhammad Mainuddin Patwary
- Environment and Sustainability Research Initiative, Khulna, Bangladesh; Environmental Science Discipline, Life Science School, Khulna University, Khulna, Bangladesh
| | - Tatiana Pethö
- Department of Managerial Psychology, The University of Presov, Presov, Slovakia
| | - Nadezhda Petrova
- Department of Human Anatomy, Histology and Embryology, Faculty of Medicine, Medical University of Plovdiv, Plovdiv, Bulgaria
| | - Jakob Pietschnig
- Department of Developmental and Educational Psychology, Faculty of Psychology, University of Vienna, Vienna, Austria
| | | | | | - Vita Poštuvan
- Slovene Centre for Suicide Research, Andrej Marusic Institute, University of Primorska, Koper, Slovenia; Department of Psychology FAMNIT, University of Primorska, Koper, Slovenia
| | - Pavol Prokop
- Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia; Institute of Zoology, Slovak Academy of Sciences, Bratislava, Slovakia
| | | | - Magdalena Razmus
- Institute of Psychology, Marie Curie-Skłodowska University, Lublin, Poland
| | - Taotao Ru
- Lab of Light and Physio-Psychological Health, National Center for International Research on Green Optoelectrics, South China Normal University, Guangzhou, China; Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China
| | - Mirjana Rupar
- Institute of Psychology, Czech Academy of Sciences, Prague, Czechia; Institute of Psychology, Jagiellonian University, Kraków, Poland
| | - Reza N Sahlan
- Department of Counseling, School, and Educational Psychology, Graduate School of Education, University at Buffalo-SUNY, Buffalo, United States of America
| | | | - Anđela Šalov
- Department of Psychology, University of Zadar, Zadar, Croatia
| | - Saphal Sapkota
- KOSHISH-National Mental Health Self-Help Organization, Kusunti, Lalitpur, Nepal
| | - Jacob Owusu Sarfo
- Department of Health, Physical Education and Recreation, University of Cape Coast, Cape Coast, Ghana
| | - Yoko Sawamiya
- Faculty of Human Sciences, University of Tsukuba, Tsukuba, Japan
| | - Katrin Schaefer
- Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria; Human Evolution and Archaeological Sciences, University of Vienna, Vienna, Austria
| | - Michael Schulte-Mecklenbeck
- Department of Consumer Behavior, University of Bern, Bern, Switzerland; Max Planck Institute for Human Development, Berlin, Germany
| | - Veya Seekis
- School of Applied Psychology, Griffith University, Gold Coast, Australia
| | - Kerim Selvi
- Department of Psychology, Eskişehir Osmangazi University, Eskişehir, Turkiye
| | - Mehdi Sharifi
- Department of Psychology, Islamic Azad University, Bandar Gaz, Iran
| | - Anita Shrivastava
- Department of Psychology, Middlesex University Dubai, Dubai, United Arab Emirates
| | | | - Valdimar Sigurdsson
- Department of Business Administration, Reykjavik University, Reykjavik, Iceland
| | - Vineta Silkane
- Faculty of Social Sciences, Vidzeme University of Applied Sciences, Valmiera, Latvia
| | - Ana Šimunić
- Department of Psychology, University of Zadar, Zadar, Croatia
| | - Govind Singh
- Department of Psychology, University of Allahabad, Prayagraj, India
| | - Alena Slezáčková
- Department of Medical Psychology and Psychosomatics, Faculty of Medicine, Masaryk University, Brno, Czechia
| | | | - Gill Ten Hoor
- Department of Work and Social Psychology, Maastricht University, Maastricht, the Netherlands
| | - Passagorn Tevichapong
- Department of Psychology, Faculty of Humanities, Chiang Mai University, Chiang Mai, Thailand
| | - Arun Tipandjan
- International Centre for Psychological Counselling and Social Research, Puducherry, India
| | - Jennifer Todd
- School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, United Kingdom; Centre for Psychological Medicine, Perdana University, Kuala Lumpur, Malaysia
| | - Constantinos Togas
- Faculty of Psychology, Panteion University of Social and Political Sciences, Athens, Greece
| | - Fernando Tonini
- Faculty of Social Sciences, University of Palermo, Buenos Aires, Argentina
| | | | - Lise Katrine Jepsen Trangsrud
- Department of Sports, Physical Education and Outdoor Studies, University of South-Eastern Norway, Bø, Telemark, Norway
| | - Pankaj Tripathi
- Department of Psychology, University of Allahabad, Prayagraj, India
| | - Otilia Tudorel
- Department of Psychology, West University of Timişoara, Timişoara, Romania
| | - Tracy L Tylka
- Department of Psychology, The Ohio State University, Columbus, United States of America
| | - Anar Uyzbayeva
- Department of General Education Disciplines, Astana IT University, Astana, Kazakhstan
| | - Zahir Vally
- Department of Clinical Psychology, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Edmunds Vanags
- Faculty of Education, Psychology, and Art, University of Latvia, Rīga, Latvia
| | - Luis Diego Vega
- Vice-rectory for Teaching, Research, and Extension, Universida Latina de Costa Rica, San José, Costa Rica
| | | | - Jose Vidal-Mollón
- Department of Research Methods and Diagnosis in Education, University of València, València, Spain
| | - Roosevelt Vilar
- Department of Psychology, Massey University, Auckland, New Zealand
| | - Hyxia Villegas
- Vice-rectory for Teaching, Research, and Extension, Universida Latina de Costa Rica, San José, Costa Rica
| | - Mona Vintilă
- Department of Psychology, West University of Timişoara, Timişoara, Romania
| | - Christoph Wallner
- Department of Plastic and Hand Surgery, BG University Hospital Bergmannsheil Bochum, Ruhr University Bochum, Bochum, Germany
| | - Mathew P White
- Department of Cognition, Emotion, and Methods in Psychology, Faculty of Psychology, University of Vienna, Vienna, Austria
| | | | - Sonja Windhager
- Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria; Human Evolution and Archaeological Sciences, University of Vienna, Vienna, Austria
| | - Kah Yan Wong
- School of Psychology, University of Nottingham Malaysia, Semenyih, Malaysia
| | - Eric Kenson Yau
- Department of Psychology, Lingnan University, Hong Kong, China
| | - Yuko Yamamiya
- Department of Undergraduate Studies, Temple University, Japan Campus, Tokyo, Japan
| | - Victoria Wai Lan Yeung
- Department of Psychology, Lingnan University, Hong Kong, China; Wofoo Joseph Lee Consulting and Counselling Psychology Research Centre, Lingnan University, Hong Kong, China
| | | | - Magdalena Zawisza
- School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, United Kingdom
| | - Nadine Zeeni
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Beirut, Lebanon
| | - Martina Zvaríková
- Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
| | - Martin Voracek
- Department of Cognition, Emotion, and Methods in Psychology, Faculty of Psychology, University of Vienna, Vienna, Austria
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2
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Wallner C, Kruber S, Adebayo SO, Ayandele O, Namatame H, Olonisakin TT, O. Olapegba P, Sawamiya Y, Suzuki T, Yamamiya Y, Wagner MJ, Drysch M, Lehnhardt M, Behr B. Interethnic Influencing Factors Regarding Buttocks Body Image in Women from Nigeria, Germany, USA and Japan. Int J Environ Res Public Health 2022; 19:13212. [PMID: 36293797 PMCID: PMC9602659 DOI: 10.3390/ijerph192013212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/04/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Body image research deals a lot with awareness of the body as an entity. Studies that consider individual anatomical aspects and place them in an intercultural context are rarely present. METHODS For this purpose, general data, body perception and judgment of body images from 2163 (48% female and 52% male) participants from Germany, Nigeria, the USA and Japan were evaluated as part of a survey. RESULTS There were clear differences in the personal body image of the participants' own buttocks, the buttocks as a beauty ideal and the way in which dissatisfaction was dealt with in different countries. In addition to sexual well-being (importance score: 0.405 a.u.), the country of origin (0.353), media consumption (0.042) and one's own weight (0.069) were also identified as influencing factors for satisfaction with one's own buttocks. A clear evolution could be derived regarding a WHR (waist-to-hip ratio) of well below 0.7, which was consistently favored by the participants but also propagated by influencers through images (p < 0.001). In this context, participants who indicated celebrities as role models for the buttocks showed a correspondingly high level of dissatisfaction with their own buttocks (R = -0.207, p < 0.001, ρ = -0.218). CONCLUSION Overall, a highly significant correlation was shown between the consumption frequency of Instagram, TikTok and pornography with the negative perception of women's own buttocks.
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Affiliation(s)
- Christoph Wallner
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp Platz 1, 44789 Bochum, Germany
| | - Svenja Kruber
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp Platz 1, 44789 Bochum, Germany
| | | | - Olusola Ayandele
- Department of Psychology, University of Ibadan, Ibadan 200005, Nigeria
- Department of General Studies, The Polytechnic, Ibadan 200285, Nigeria
| | - Hikari Namatame
- Faculty of Human Sciences, University of Tsukuba, Ibaraki 305-8577, Japan
| | | | - Peter O. Olapegba
- Department of Psychology, University of Ibadan, Ibadan 200005, Nigeria
| | - Yoko Sawamiya
- Faculty of Human Sciences, University of Tsukuba, Ibaraki 305-8577, Japan
| | - Tomohiro Suzuki
- Department of Child Psychology, Tokyo Future University, Tokyo 120-0023, Japan
| | - Yuko Yamamiya
- Department of Undergraduate Studies, Temple University, Japan Campus, Tokyo 154-0004, Japan
| | - Maximilian Johannes Wagner
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp Platz 1, 44789 Bochum, Germany
| | - Marius Drysch
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp Platz 1, 44789 Bochum, Germany
| | - Marcus Lehnhardt
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp Platz 1, 44789 Bochum, Germany
| | - Björn Behr
- Department of Plastic Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp Platz 1, 44789 Bochum, Germany
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3
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Namatame H, Yamamiya Y, Shimai S, Sawamiya Y. Psychometric validation of the Japanese version of the Functionality Appreciation Scale (FAS). Body Image 2022; 40:116-123. [PMID: 34922063 DOI: 10.1016/j.bodyim.2021.11.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/24/2021] [Accepted: 11/30/2021] [Indexed: 01/07/2023]
Abstract
The Functionality Appreciation Scale (FAS; Alleva et al., 2017) is a widely adopted measure to assess appreciation for one's body and its capacity. In this study, we performed a psychometric validation of the Japanese translation of the FAS. Participants included an online sample of 750 Japanese individuals (20-70 years old), who completed the FAS and other previously validated measures of body appreciation, intuitive eating, gratitude, self-esteem, and life satisfaction. Moreover, the survey was conducted twice, 3 weeks apart, to determine test-retest reliability. Exploratory factor analyses replicated the unidimensional factor structure of the FAS, which was also verified by the confirmatory factor analysis. FAS scores had gender invariance, and demonstrated good internal consistency and test-retest reliability over the 3-week period. In addition, further analyzes indicated adequate construct, and incremental validity. These findings indicate that the Japanese version of FAS demonstrates good psychometric properties, and can be used to examine the importance of functionality appreciation for enhancing positive body image and healthy eating.
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Affiliation(s)
- Hikari Namatame
- Faculty of Human Sciences, University of Tsukuba, Ibaraki, Japan; National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Yuko Yamamiya
- Department of Undergraduate Studies, Temple University - Japan Campus, Tokyo, Japan
| | - Satoshi Shimai
- Department of Psychological Sciences, Kansai University of Welfare Sciences, Osaka, Japan
| | - Yoko Sawamiya
- Faculty of Human Sciences, University of Tsukuba, Ibaraki, Japan
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4
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Fujisato H, Kato N, Namatame H, Ito M, Usami M, Nomura T, Ninomiya S, Horikoshi M. The Unified Protocol for Transdiagnostic Treatment of Emotional Disorders Among Japanese Children: A Pilot Study. Front Psychol 2021; 12:731819. [PMID: 34899471 PMCID: PMC8654783 DOI: 10.3389/fpsyg.2021.731819] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 11/01/2021] [Indexed: 11/13/2022] Open
Abstract
At present, there is no established cognitive behavioral therapy (CBT) for treating emotional disorders in Japanese children. Therefore, we introduced the Unified Protocol for Transdiagnostic Treatment of Emotional Disorders in Children (UP-C) in Japan and adapted it to the Japanese context. We then examined its feasibility and preliminary efficacy using a single-arm pretest, posttest, follow-up design. Seventeen Japanese children aged between 8 and 12 years (female n = 11; male n = 6; M = 10.06 ± 0.97 years) with a principal diagnosis of anxiety, obsessive-compulsive, or depressive disorders, and their parents were enrolled in the study. The primary outcome was the overall severity of emotional disorders as assessed by psychiatrists using the Clinical Global Impression-Severity Scale. Secondary outcomes included child- and parent-reported anxiety symptoms, depressive symptoms, and functional status. No severe adverse events were observed. The feasibility was confirmed by the low dropout proportion (11.76%), high attendance proportion (children: 95.6%; parents: 94.6%), and sufficient participant satisfaction. Linear mixed models (LMMs) showed that the overall severity of emotional disorders and child- and parent-reported anxiety symptoms improved from pre-treatment to post-treatment, and that these treatment effects were maintained during the 3-month follow-up period. Additionally, child- and parent-reported functional status improved from pre-treatment to the 3-month follow-up. In contrast, child-reported depressive symptoms improved from pre-treatment to follow-up, but there was no significant change in parent-reported depressive symptoms between pre-treatment and other time points. These findings demonstrate the feasibility and preliminary efficacy of the Japanese version of the UP-C, suggesting that future randomized controlled trials (RCTs) are warranted (Clinical trial registration: UMIN000026911).
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Affiliation(s)
- Hiroko Fujisato
- National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Noriko Kato
- National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Hikari Namatame
- National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Tokyo, Japan.,Faculty of Human Sciences, University of Tsukuba, Ibaraki, Japan
| | - Masaya Ito
- National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Masahide Usami
- Kohnodai Hospital, National Center for Global Health and Medicine, Chiba, Japan
| | - Tomoko Nomura
- Kohnodai Hospital, National Center for Global Health and Medicine, Chiba, Japan.,Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Shuzo Ninomiya
- Kohnodai Hospital, National Center for Global Health and Medicine, Chiba, Japan
| | - Masaru Horikoshi
- National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Tokyo, Japan
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5
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Ideta S, Johnston S, Yoshida T, Tanaka K, Mori M, Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Ishida S, Takashima K, Kojima KM, Devereaux TP, Uchida S, Fujimori A. Hybridization of Bogoliubov Quasiparticles between Adjacent CuO_{2} Layers in the Triple-Layer Cuprate Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{10+δ} Studied by Angle-Resolved Photoemission Spectroscopy. Phys Rev Lett 2021; 127:217004. [PMID: 34860085 DOI: 10.1103/physrevlett.127.217004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 07/08/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Hybridization of Bogoliubov quasiparticles (BQPs) between the CuO_{2} layers in the triple-layer cuprate high-temperature superconductor Bi_{2}Sr_{2}Cu_{2}Cu_{3}O_{10+δ} is studied by angle-resolved photoemission spectroscopy (ARPES). In the superconducting state, an anticrossing gap opens between the outer- and inner-BQP bands, which we attribute primarily to interlayer single-particle hopping with possible contributions from interlayer Cooper pairing. We find that the d-wave superconducting gap of both BQP bands smoothly develops with momentum without an abrupt jump in contrast to a previous ARPES study. Hybridization between the BQPs also gradually increases in going from the off nodal to the antinodal region, which is explained by the momentum dependence of the interlayer single-particle hopping. As possible mechanisms for the enhancement of the superconducting transition temperature, the hybridization between the BQPs as well as the combination of phonon modes of the triple CuO_{2} layers and spin fluctuations represented by a four-well model are discussed.
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Affiliation(s)
- S Ideta
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- UVSOR-III Synchrotron, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - S Johnston
- Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA
| | - T Yoshida
- Department of Human and Environmental studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - K Tanaka
- UVSOR-III Synchrotron, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - M Mori
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
| | - H Anzai
- Graduate School of Engineering, Osaka Prefecture University, Sakai 599-8531, Japan
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - A Ino
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
- Department of Education and Creation Engineering, Kurume Institute of Technology, Fukuoka 2286-66, Japan
| | - M Arita
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - H Namatame
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - M Taniguchi
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - S Ishida
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
| | - K Takashima
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - K M Kojima
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- J-PARC Center and Institute of Materials Structure Science, KEK, Tsukuba, Ibaraki 305-0801, Japan
- Centre for Molecular and Materials Science, TRIUMF, 4004 Vancouver, Canada
| | - T P Devereaux
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
- Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory and Stanford University, Menlo Park, California 94025, USA
- Department of Materials Science and Engineering Stanford University, Stanford, California 94305, USA
| | - S Uchida
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
| | - A Fujimori
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Department of Applied Physics, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan
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6
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Razmus M, Razmus W, Tylka TL, Jović M, Jović M, Namatame H. Cross-cultural measurement invariance of the Body Appreciation Scale-2 across five countries. Body Image 2020; 34:270-276. [PMID: 32711371 DOI: 10.1016/j.bodyim.2020.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 07/09/2020] [Accepted: 07/09/2020] [Indexed: 12/21/2022]
Abstract
The Body Appreciation Scale-2 (BAS-2; Tylka & Wood-Barcalow, 2015a, 2015b) is a widely used measure of positive body image within many cultures and countries; yet, cross-cultural examinations are few. The present study aimed to investigate the measurement invariance of the BAS-2 across adults from five countries: Iran, Japan, Poland, Serbia, and the U.S. The sample included 2944 participants ranging in age from 18 to 82 years. The findings provided evidence that the BAS-2's one-dimensional structure is the same in these countries. Partial metric invariance (when some but not all items contribute to a latent construct equally for groups) indicated that nine out of 10 items contributed to the latent body appreciation construct to a similar degree across the countries. When a Multiple Indicators Multiple Causes (MIMIC) model was applied with participants' age and gender as covariates, evidence of differential item functioning was found. Results suggest that both age and gender influenced body appreciation, indicating that the body appreciation factor means are different at different levels of the covariates. In conclusion, cross-culturally body appreciation may be shaped by country, language, age, and gender correlates to different degrees. In future research, measurement invariance analyses should be conducted prior to cultural group comparisons on the BAS-2.
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Affiliation(s)
- Magdalena Razmus
- Institute of Psychology, Maria Curie-Sklodowska University, Plac Litewski 5, 20-080, Lublin, Poland.
| | - Wiktor Razmus
- Institute of Psychology, The John Paul II Catholic University of Lublin, Al. Raclawickie 14, 20-950, Lublin, Poland.
| | - Tracy L Tylka
- Department of Psychology, The Ohio State University, 1465 Mt. Vernon Avenue, Marion, OH, 43302, United States.
| | - Marija Jović
- Department of Marketing Management and Public Relations, University of Belgrade, Jove Ilića 154, 11000, Belgrade, Serbia.
| | - Marko Jović
- Department of Plastic and Reconstructive Surgery, School of Medicine, University of Belgrade, Zvecanska 9, 11000, Belgrade, Serbia.
| | - Hikari Namatame
- Faculty of Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8572, Japan.
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7
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Namatame H, Yashima Y, Sawamiya Y. Psychometric properties of the Japanese version of the Body Appreciation Scale-2 for Children (BAS-2C). Body Image 2020; 33:7-12. [PMID: 32062410 DOI: 10.1016/j.bodyim.2020.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/08/2020] [Accepted: 01/08/2020] [Indexed: 01/26/2023]
Abstract
Despite the heightened interest in positive body image research in recent years, few studies have explored positive body image among children. Examining the Body Appreciation Scale-2 for Children (BAS-2C) using a different cultural sample than the original version would thus be beneficial in extending the research on this topic. This research aimed to validate the BAS-2C for use in Japan. The measures were administered to 243 children, and the participants completed the survey in their classrooms with the support of a teacher. The survey was repeated after four weeks. Confirmatory factor analysis showed that the one-factor structure was the same as that of the original version, and the BAS-2C was invariant across gender. Scores on the BAS-2C demonstrated good internal consistency and test-retest reliability over a four-week period. In addition, construct validity was accrued through the BAS-2C's correlation with body dissatisfaction (among girls), self-esteem, and life satisfaction. Results indicated that the BAS-2C shows good psychometric properties among Japanese children, and supports further research into positive body image in this group.
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Affiliation(s)
- Hikari Namatame
- Faculty of Human Sciences, University of Tsukuba, Tsukuba City, Ibaraki, Japan; National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Kodaira City, Tokyo, Japan.
| | | | - Yoko Sawamiya
- Faculty of Human Sciences, University of Tsukuba, Tsukuba City, Ibaraki, Japan
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8
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Swami V, Tran US, Barron D, Afhami R, Aimé A, Almenara CA, Alp Dal N, Amaral ACS, Andrianto S, Anjum G, Argyrides M, Atari M, Aziz M, Banai B, Borowiec J, Brewis A, Cakir Kocak Y, Campos JADB, Carmona C, Chaleeraktrakoon T, Chen H, Chobthamkit P, Choompunuch B, Constantinos T, Crumlish A, Cruz JE, Dalley SE, Damayanti D, Dare J, Donofrio SM, Draksler A, Escasa-Dorne M, Fernandez EF, Ferreira MEC, Frederick DA, García AA, Geller S, George A, Ghazieh L, Goian C, Gorman C, Grano C, Handelzalts JE, Horsburgh H, Jackson T, Javela Delgado LGJ, Jović M, Jović M, Kantanista A, Kertechian SK, Kessels L, Król-Zielińska M, Kuan G, Kueh YC, Kumar S, Kvalem IL, Lombardo C, Luis López Almada E, Maïano C, Manjary M, Massar K, Matera C, Mereiles JFF, Meskó N, Namatame H, Nerini A, Neto F, Neto J, Neves AN, Ng SK, Nithiya DR, Omar SS, Omori M, Panasiti MS, Pavela Banai I, Pila E, Pokrajac-Bulian A, Postuvan V, Prichard I, Razmus M, Sabiston CM, Sahlan RN, Sarfo JO, Sawamiya Y, Stieger S, SturtzSreetharan C, Tee E, Ten Hoor GA, Thongpibul K, Tipandjan A, Tudorel O, Tylka T, Vally Z, Vargas-Nieto JC, Vega LD, Vidal-Mollón J, Vintila M, Williams D, Wutich A, Yamamiya Y, Zambrano D, Zanetti MC, Živčić-Bećirević I, Voracek M. The Breast Size Satisfaction Survey (BSSS): Breast size dissatisfaction and its antecedents and outcomes in women from 40 nations. Body Image 2020; 32:199-217. [PMID: 32032822 DOI: 10.1016/j.bodyim.2020.01.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 01/24/2020] [Accepted: 01/25/2020] [Indexed: 12/17/2022]
Abstract
The Breast Size Satisfaction Survey (BSSS) was established to assess women's breast size dissatisfaction and breasted experiences from a cross-national perspective. A total of 18,541 women were recruited from 61 research sites across 40 nations and completed measures of current-ideal breast size discrepancy, as well as measures of theorised antecedents (personality, Western and local media exposure, and proxies of socioeconomic status) and outcomes (weight and appearance dissatisfaction, breast awareness, and psychological well-being). In the total dataset, 47.5 % of women wanted larger breasts than they currently had, 23.2 % wanted smaller breasts, and 29.3 % were satisfied with their current breast size. There were significant cross-national differences in mean ideal breast size and absolute breast size dissatisfaction, but effect sizes were small (η2 = .02-.03). The results of multilevel modelling showed that greater Neuroticism, lower Conscientiousness, lower Western media exposure, greater local media exposure, lower financial security, and younger age were associated with greater breast size dissatisfaction across nations. In addition, greater absolute breast size dissatisfaction was associated with greater weight and appearance dissatisfaction, poorer breast awareness, and poorer psychological well-being across nations. These results indicate that breast size dissatisfaction is a global public health concern linked to women's psychological and physical well-being.
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Affiliation(s)
- Viren Swami
- School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, United Kingdom; Centre for Psychological Medicine, Perdana University, Serdang, Malaysia.
| | - Ulrich S Tran
- Department of Basic Psychological Research and Research Methods, School of Psychology, University of Vienna, Vienna, Austria
| | - David Barron
- Centre for Psychological Medicine, Perdana University, Serdang, Malaysia
| | - Reza Afhami
- Department of Art Studies, Tarbiat Modares University, Tehran, Iran
| | - Annie Aimé
- Department of Psychoeducation and Psychology, Université du Québec en Outaouais, Saint-Jérôme, Canada
| | - Carlos A Almenara
- Institute for Research on Children, Youth, and Family, Faculty of Social Studies, Masaryk University, Brno, Czech Republic
| | - Nursel Alp Dal
- Midwifery Department, Munzur University, Tunceli, Turkey
| | - Ana Carolina Soares Amaral
- Federal Institute of Education, Science, and Technology of Southeast Minas Gerais, São Barbacena, Brazil
| | - Sonny Andrianto
- Department of Psychology, Islamic University of Indonesia, Yogyakarta, Indonesia
| | - Gulnaz Anjum
- Department of Social Sciences and Liberal Arts, Institute of Business Administration, Karachi, Pakistan
| | - Marios Argyrides
- School of Health Sciences, Neapolis University Paphos, Paphos, Cyprus
| | - Mohammad Atari
- Department of Psychology, University of Southern California, Los Angeles, United States
| | - Mudassar Aziz
- Department of Social Sciences, Shaheed Zulfikar Ali Bhutto Institute of Science and Technology, Karachi, Pakistan
| | - Benjamin Banai
- Department of Psychology, University of Zadar, Zadar, Croatia
| | - Joanna Borowiec
- Department of Physical Education and Lifelong Sports, Poznań University of Physical Education, Poznań, Poland
| | - Alexandra Brewis
- School of Human Evolution and Social Change, Arizona State University, Tempe, United States
| | | | | | - Carmen Carmona
- Department of Research Methods and Diagnosis in Education, University of Valencia, Valencia, Spain
| | - Trawin Chaleeraktrakoon
- Division of Psychology, Faculty of Liberal Arts, Thammasat University, Pathumthani, Thailand
| | - Hong Chen
- School of Psychology, Southwest University, Chongqing, China
| | - Phatthanakit Chobthamkit
- Division of Psychology, Faculty of Liberal Arts, Thammasat University, Pathumthani, Thailand; School of Psychology, University of Kent, Canterbury, United Kingdom
| | - Bovornpot Choompunuch
- Department of Educational Psychology and Counseling, Faculty of Education, Khon Kaen University, Khon Kaen, Thailand
| | | | - Aine Crumlish
- School of Psychology, Ulster University, Coleraine, Northern Ireland, United Kingdom
| | | | - Simon E Dalley
- Faculty of Behavioural and Social Sciences, University of Groningen, Groningen, Netherlands
| | - Devi Damayanti
- Department of Psychology, Ahmad Dahlan University, Yogyakarta, Indonesia
| | - Joanna Dare
- Department of Psychology, Chapman University, Orange, United States
| | - Stacey M Donofrio
- Faculty of Behavioural and Social Sciences, University of Groningen, Groningen, Netherlands
| | - Anja Draksler
- Slovene Centre for Suicide Research, Andrej Marusic Institute and Department of Psychology FAMNIT, University of Primorska, Koper, Slovenia
| | | | | | | | | | | | - Shulamit Geller
- School of Behavioral Sciences, Academic College of Tel-Aviv Yaffo, Yaffo, Israel
| | - Alexias George
- Department of Psychology, Panteion University of Athens, Athens, Greece
| | - Louai Ghazieh
- Department of Human Resources, Saint Joseph University, Beirut, Lebanon
| | - Cosmin Goian
- Department of Social Work, West University of Timișoara, Timișoara, Romania
| | - Colin Gorman
- School of Psychology, Ulster University, Coleraine, Northern Ireland, United Kingdom
| | - Caterina Grano
- Department of Psychology, Sapienza University of Rome, Rome, Italy
| | | | - Heather Horsburgh
- School of Social Sciences, University of Southampton, Southampton, United Kingdom
| | - Todd Jackson
- Department of Psychology, University of Macau, Taipa, China
| | | | - Marija Jović
- Department of Marketing Management and Public Relations, University of Belgrade, Belgrade, Serbia
| | - Marko Jović
- Department of Plastic and Reconstructive Surgery, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - Adam Kantanista
- Department of Physical Education and Lifelong Sports, Poznań University of Physical Education, Poznań, Poland
| | | | - Loes Kessels
- Department of Work and Social Psychology, Maastricht University, Maastricht, Netherlands
| | - Magdalena Król-Zielińska
- Department of Physical Education and Lifelong Sports, Poznań University of Physical Education, Poznań, Poland
| | - Garry Kuan
- School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Yee Cheng Kueh
- Unit of Biostatistics and Research Methodology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Sanjay Kumar
- Department of Psychology, D.A.V. College, Muzaffarnagar, India
| | | | | | | | - Christophe Maïano
- Department of Psychoeducation and Psychology, Université du Québec en Outaouais, Saint-Jérôme, Canada
| | - Mandar Manjary
- Department of Psychology, D.A.V. College, Muzaffarnagar, India
| | - Karlijn Massar
- Department of Work and Social Psychology, Maastricht University, Maastricht, Netherlands
| | - Camilla Matera
- Department of Education, Languages, Intercultures, Literatures, and Psychology, University of Florence, Florence, Italy
| | | | - Norbert Meskó
- Department of General and Evolutionary Psychology, Institute of Psychology, University of Pécs, Pécs, Hungary
| | - Hikari Namatame
- Department of Psychology, University of Tsukuba, Tsukuba, Japan
| | - Amanda Nerini
- Department of Education, Languages, Intercultures, Literatures, and Psychology, University of Florence, Florence, Italy
| | - Felix Neto
- Department of Psychology, University of Porto, Porto, Portugal
| | - Joana Neto
- Department of Psychology, Catholic University of Brasília, Taguatinga, Brazil
| | - Angela Nogueira Neves
- Division of Research, Physical Education College of the Brazilian Army, Rio de Janeiro, Brazil
| | - Siu-Kuen Ng
- Physical Education Unit, Chinese University of Hong Kong, Hong Kong, China
| | - Devi R Nithiya
- Department of Physiology, Mahatma Gandhi Medical College and Research Institute, Sri Balaji Vidyapeth, India
| | - Salma Samir Omar
- Department of Dermatology, Venereology, and Andrology, Alexandria University, Alexandria, Egypt
| | - Mika Omori
- Department of Psychology, Ochanomizu University, Tokyo, Japan
| | - Maria Serena Panasiti
- Santa Lucia Foundation, Scientific Institute for Research and Healthcare, Rome, Italy
| | | | - Eva Pila
- School of Kinesiology, University of Western Ontario, Ontario, Canada
| | - Alessandra Pokrajac-Bulian
- Department of Psychology, Faculty of Humanities and Social Sciences, University of Rijeka, Rijeka, Croatia
| | - Vita Postuvan
- Slovene Centre for Suicide Research, Andrej Marusic Institute and Department of Psychology FAMNIT, University of Primorska, Koper, Slovenia
| | - Ivanka Prichard
- College of Nursing and Health Sciences, Flinders University, Adelaide, Australia
| | - Magdalena Razmus
- Institute of Psychology, Marie Curie-Skłodowska University, Lublin, Poland
| | - Catherine M Sabiston
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Canada
| | - Reza N Sahlan
- Department of Clinical Psychology, Iran University of Medical Sciences, Tehran, Iran
| | - Jacob Owusu Sarfo
- Department of Nursing, All Nations University College, Koforidua, Ghana
| | - Yoko Sawamiya
- Department of Psychology, University of Tsukuba, Tsukuba, Japan
| | - Stefan Stieger
- Department of Psychology and Psychodynamics, Karl Landsteiner University of Health Sciences, Krems an der Donau, Austria; Department of Psychology, Research Methods, Assessment, and iScience, University of Konstanz, Konstanz, Germany
| | - Cindi SturtzSreetharan
- School of Human Evolution and Social Change, Arizona State University, Tempe, United States
| | - Eugene Tee
- Department of Psychology, HELP University, Shah Alam, Malaysia
| | - Gill A Ten Hoor
- Department of Work and Social Psychology, Maastricht University, Maastricht, Netherlands
| | - Kulvadee Thongpibul
- Department of Psychology, Faculty of Humanities, Chiang Mai University, Chiang Mai, Thailand
| | - Arun Tipandjan
- Indira Gandhi Government General Hospital and Postgraduate Institute, Puducherry, India
| | - Otilia Tudorel
- Department of Psychology, West University of Timișoara, Timișoara, Romania
| | - Tracy Tylka
- Department of Psychology, Ohio State University, Columbus, United States
| | - Zahir Vally
- Department of Psychology and Counseling, United Arab Emirates University, Al Ain, United Arab Emirates
| | | | - Luis Diego Vega
- Department of Psychology, Universidad Latina de Costa Rica, San José, Costa Rica
| | - Jose Vidal-Mollón
- Department of Research Methods and Diagnosis in Education, University of Valencia, Valencia, Spain
| | - Mona Vintila
- Department of Psychology, West University of Timișoara, Timișoara, Romania
| | - Deborah Williams
- College of Health Solutions, Arizona State University, Phoenix, Arizona, United States
| | - Amber Wutich
- School of Human Evolution and Social Change, Arizona State University, Tempe, United States
| | - Yuko Yamamiya
- Department of Undergraduate Studies, Temple University Japan, Tokyo, Japan
| | - Danilo Zambrano
- Department of Psychology, Fundación Universitaria Konrad Lonrez, Bogotá, Colombia
| | | | - Ivanka Živčić-Bećirević
- Department of Psychology, Faculty of Humanities and Social Sciences, University of Rijeka, Rijeka, Croatia
| | - Martin Voracek
- Department of Basic Psychological Research and Research Methods, School of Psychology, University of Vienna, Vienna, Austria
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9
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Ito S, Arita M, Haruyama J, Feng B, Chen WC, Namatame H, Taniguchi M, Cheng CM, Bian G, Tang SJ, Chiang TC, Sugino O, Komori F, Matsuda I. Surface-state Coulomb repulsion accelerates a metal-insulator transition in topological semimetal nanofilms. Sci Adv 2020; 6:eaaz5015. [PMID: 32219169 PMCID: PMC7083614 DOI: 10.1126/sciadv.aaz5015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 12/30/2019] [Indexed: 06/10/2023]
Abstract
The emergence of quantization at the nanoscale, the quantum size effect (QSE), allows flexible control of matter and is a rich source of advanced functionalities. A QSE-induced transition into an insulating phase in semimetallic nanofilms was predicted for bismuth a half-century ago and has regained new interest with regard to its surface states exhibiting nontrivial electronic topology. Here, we reveal an unexpected mechanism of the transition by high-resolution angle-resolved photoelectron spectroscopy combined with theoretical calculations. Anomalous evolution and degeneracy of quantized energy levels indicate that increased Coulomb repulsion from the surface states deforms a quantum confinement potential with decreasing thickness. The potential deformation strongly modulates spatial distributions of quantized wave functions, which leads to acceleration of the transition beyond the original QSE picture. This discovery establishes a complete picture of the long-discussed transition and highlights a new class of size effects dominating nanoscale transport in systems with metallic surface states.
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Affiliation(s)
- S. Ito
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, Japan
| | - M. Arita
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - J. Haruyama
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, Japan
| | - B. Feng
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - W.-C. Chen
- Department of Physics and Astronomy, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
| | - H. Namatame
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - M. Taniguchi
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
| | - C.-M. Cheng
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu, Taiwan, Republic of China
| | - G. Bian
- Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA
| | - S.-J. Tang
- Department of Physics and Astronomy, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu, Taiwan, Republic of China
| | - T.-C. Chiang
- Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - O. Sugino
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, Japan
| | - F. Komori
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, Japan
| | - I. Matsuda
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, Japan
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10
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Namatame H, Fujisato H, Ito M, Sawamiya Y. Development and Validation of a Japanese Version of the Emotion Regulation Questionnaire for Children and Adolescents. Neuropsychiatr Dis Treat 2020; 16:209-219. [PMID: 32021215 PMCID: PMC6982453 DOI: 10.2147/ndt.s211175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 12/20/2019] [Indexed: 11/23/2022] Open
Abstract
PURPOSE We developed a Japanese version of the Emotion Regulation Questionnaire for Children and Adolescents (ERQ-CA) and examined its reliability and validity across three studies. PATIENTS AND METHODS In Study 1, the Japanese version of ERQ-CA was developed and administered to 389 children aged 8-12 years. In Study 2, the questionnaire was administered to 1738 adolescents aged 12-18 years. In Study 3, utilizing a sample of 1300 children and adolescents, the test was administered twice over a period of four weeks in order to assess test-retest reliability. RESULTS In Study 1, the Japanese version of ERQ-CA showed the same factor structure as the original version, along with good internal consistency reliability and acceptable construct validity. In Study 2, the questionnaire's factor structure, internal consistency reliability, and construct validity were again confirmed. Finally, in Study 3, measurement invariance was tested across distinct age groups (8-11, 12-15, and 16-18 years), and the questionnaire had good test-retest reliability over a period of four weeks. CONCLUSION The Japanese version of the ERQ-CA had good reliability and validity.
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Affiliation(s)
- Hikari Namatame
- Faculty of Human Sciences, University of Tsukuba, Tsukuba City, Ibaraki, Japan.,National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Kodaira City, Tokyo, Japan
| | - Hiroko Fujisato
- National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Kodaira City, Tokyo, Japan
| | - Masaya Ito
- National Center for Cognitive Behavior Therapy and Research, National Center of Neurology and Psychiatry, Kodaira City, Tokyo, Japan
| | - Yoko Sawamiya
- Faculty of Human Sciences, University of Tsukuba, Tsukuba City, Ibaraki, Japan
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11
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Rousuli A, Sato H, Iga F, Hayashi K, Ishii K, Wada T, Nagasaki T, Mimura K, Anzai H, Ichiki K, Ueda S, Kondo A, Kindo K, Takabatake T, Shimada K, Namatame H, Taniguchi M. Hard x-ray photoemission study of Yb 1-x Zr x B 12: the effects of electron doping on the Kondo insulator YbB 12. J Phys Condens Matter 2017; 29:265601. [PMID: 28443603 DOI: 10.1088/1361-648x/aa6f70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We have carried out hard x-ray photoemission spectroscopy (HAXPES) of Yb1-x Zr x B12 ([Formula: see text]) to study the effects of electron doping on the Kondo insulator YbB12. The Yb valences of Yb1-x Zr x B12 at 300 K estimated from the Yb 3d HAXPES spectra decreased after substituting Yb with Zr from 2.93 for YbB12 to 2.83 for Yb0.125Zr0.875B12. A temperature dependent valence decrease was found upon cooling for all doping concentrations. We found peak shifts of the B 1s and Zr 3d5/2, and Yb3+ 4f spectra toward the deeper binding-energy with increasing Zr concentration, which indicates a shift of the Fermi level to the higher energy and that of the Yb 4f hole level close to the Fermi level, respectively, due to electron doping. These results qualitatively show the enhanced hybridization between the Yb 4f and conduction-band states with Zr substitution, consistent with magnetic susceptibility measurements.
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Affiliation(s)
- A Rousuli
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
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12
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Iwasawa H, Shimada K, Schwier EF, Zheng M, Kojima Y, Hayashi H, Jiang J, Higashiguchi M, Aiura Y, Namatame H, Taniguchi M. Rotatable high-resolution ARPES system for tunable linear-polarization geometry. J Synchrotron Radiat 2017; 24:836-841. [PMID: 28664891 PMCID: PMC5493027 DOI: 10.1107/s1600577517008037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 05/30/2017] [Indexed: 05/13/2023]
Abstract
A rotatable high-resolution angle-resolved photoemission spectroscopy (ARPES) system has been developed to utilize tunable linear-polarization geometries on the linear undulator beamline (BL-1) at Hiroshima Synchrotron Radiation Center. By rotating the whole ARPES measurement system, the photoelectron detection plane can be continuously changed from parallel to normal against the electric field vector of linearly polarized undulator radiation. This polarization tunability enables us to identify the symmetry of the initial electronic states with respect to the mirror planes, and to selectively observe the electronic states based on the dipole selection rule in the photoemission process. Specifications of the rotatable high-resolution ARPES system are described, as well as its capabilities with some representative experimental results.
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Affiliation(s)
- H. Iwasawa
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
- Correspondence e-mail: ,
| | - K. Shimada
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
- Correspondence e-mail: ,
| | - E. F. Schwier
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - M. Zheng
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Y. Kojima
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - H. Hayashi
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - J. Jiang
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - M. Higashiguchi
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Y. Aiura
- National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
| | - H. Namatame
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - M. Taniguchi
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
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13
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Kondo T, Ochi M, Nakayama M, Taniguchi H, Akebi S, Kuroda K, Arita M, Sakai S, Namatame H, Taniguchi M, Maeno Y, Arita R, Shin S. Orbital-Dependent Band Narrowing Revealed in an Extremely Correlated Hund's Metal Emerging on the Topmost Layer of Sr_{2}RuO_{4}. Phys Rev Lett 2016; 117:247001. [PMID: 28009182 DOI: 10.1103/physrevlett.117.247001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Indexed: 06/06/2023]
Abstract
We use a surface-selective angle-resolved photoemission spectroscopy and unveil the electronic nature on the topmost layer of Sr_{2}RuO_{4} crystal, consisting of slightly rotated RuO_{6} octahedrons. The γ band derived from the 4d_{xy} orbital is found to be about three times narrower than that for the bulk. This strongly contrasts with a subtle variation seen in the α and β bands derived from the one-dimensional 4d_{xz/yz}. This anomaly is reproduced by the dynamical mean-field theory calculations, introducing not only the on-site Hubbard interaction but also the significant Hund's coupling. We detect a coherence-to-incoherence crossover theoretically predicted for Hund's metals, which has been recognized only recently. The crossover temperature in the surface is about half that of the bulk, indicating that the naturally generated monolayer of reconstructed Sr_{2}RuO_{4} is extremely correlated and well isolated from the underlying crystal.
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Affiliation(s)
- Takeshi Kondo
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - M Ochi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - M Nakayama
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - H Taniguchi
- Department of Materials Science and Engineering, Iwate University, Morioka 020-8551, Japan
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - S Akebi
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - K Kuroda
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - M Arita
- Hiroshima Synchrotron Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - S Sakai
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - H Namatame
- Hiroshima Synchrotron Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - M Taniguchi
- Hiroshima Synchrotron Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Y Maeno
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - R Arita
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - S Shin
- ISSP, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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14
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Ito S, Feng B, Arita M, Takayama A, Liu RY, Someya T, Chen WC, Iimori T, Namatame H, Taniguchi M, Cheng CM, Tang SJ, Komori F, Kobayashi K, Chiang TC, Matsuda I. Proving Nontrivial Topology of Pure Bismuth by Quantum Confinement. Phys Rev Lett 2016; 117:236402. [PMID: 27982650 DOI: 10.1103/physrevlett.117.236402] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Indexed: 06/06/2023]
Abstract
The topology of pure Bi is controversial because of its very small (∼10 meV) band gap. Here we perform high-resolution angle-resolved photoelectron spectroscopy measurements systematically on 14-202 bilayer Bi films. Using high-quality films, we succeed in observing quantized bulk bands with energy separations down to ∼10 meV. Detailed analyses on the phase shift of the confined wave functions precisely determine the surface and bulk electronic structures, which unambiguously show nontrivial topology. The present results not only prove the fundamental property of Bi but also introduce a capability of the quantum-confinement approach.
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Affiliation(s)
- S Ito
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - B Feng
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - M Arita
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - A Takayama
- Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - R-Y Liu
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - T Someya
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - W-C Chen
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu, Taiwan 30076, Republic of China
| | - T Iimori
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - H Namatame
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - M Taniguchi
- Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - C-M Cheng
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu, Taiwan 30076, Republic of China
| | - S-J Tang
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu, Taiwan 30076, Republic of China
- Department of Physics and Astronomy, National Tsing Hua University, Hsinchu, Taiwan 30013, Republic of China
| | - F Komori
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - K Kobayashi
- Department of Physics, Ochanomizu University, Bunkyo-ku, Tokyo 112-8610, Japan
| | - T-C Chiang
- Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - I Matsuda
- Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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15
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Yagi S, Menjo Y, Tsukada C, Ogawa S, Kutluk G, Namatame H, Taniguchi M. Vulcanization reaction of squalene and S8powder studied by Sulfur K-edge NEXAFS under liquid phase. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1757-899x/76/1/012004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Yoshida T, Ideta S, Shimojima T, Malaeb W, Shinada K, Suzuki H, Nishi I, Fujimori A, Ishizaka K, Shin S, Nakashima Y, Anzai H, Arita M, Ino A, Namatame H, Taniguchi M, Kumigashira H, Ono K, Kasahara S, Shibauchi T, Terashima T, Matsuda Y, Nakajima M, Uchida S, Tomioka Y, Ito T, Kihou K, Lee CH, Iyo A, Eisaki H, Ikeda H, Arita R, Saito T, Onari S, Kontani H. Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As(1-x)P(x))2. Sci Rep 2014; 4:7292. [PMID: 25465027 PMCID: PMC4252890 DOI: 10.1038/srep07292] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 11/14/2014] [Indexed: 11/22/2022] Open
Abstract
We report peculiar momentum-dependent anisotropy in the superconducting gap observed by angle-resolved photoemission spectroscopy in BaFe2(As1-xPx)2 (x = 0.30, Tc = 30 K). Strongly anisotropic gap has been found only in the electron Fermi surface while the gap on the entire hole Fermi surfaces are nearly isotropic. These results are inconsistent with horizontal nodes but are consistent with modified s± gap with nodal loops. We have shown that the complicated gap modulation can be theoretically reproduced by considering both spin and orbital fluctuations.
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Affiliation(s)
- T Yoshida
- 1] Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan [2] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan
| | - S Ideta
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - T Shimojima
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
| | - W Malaeb
- Institute of Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - K Shinada
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
| | - H Suzuki
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - I Nishi
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - A Fujimori
- 1] Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan [2] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan
| | - K Ishizaka
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
| | - S Shin
- Institute of Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - Y Nakashima
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - H Anzai
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - M Arita
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - A Ino
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - H Namatame
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - M Taniguchi
- 1] Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan [2] Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
| | - H Kumigashira
- KEK, Photon Factory, Tsukuba, Ibaraki 305-0801, Japan
| | - K Ono
- KEK, Photon Factory, Tsukuba, Ibaraki 305-0801, Japan
| | - S Kasahara
- 1] Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8502, Japan [2] Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T Shibauchi
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - T Terashima
- Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto 606-8502, Japan
| | - Y Matsuda
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - M Nakajima
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - S Uchida
- 1] Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan [2] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan
| | - Y Tomioka
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan
| | - T Ito
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan
| | - K Kihou
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan
| | - C H Lee
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan
| | - A Iyo
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan
| | - H Eisaki
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568, Japan
| | - H Ikeda
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - R Arita
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
| | - T Saito
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] Department of Physics, Nagoya University, Furo-cho, Nagoya 464-8602, Japan
| | - S Onari
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] Department of Applied Physics, Nagoya University, Furo-cho, Nagoya 464-8602, Japan
| | - H Kontani
- 1] JST, Transformative Research-Project on Iron Pnictides (TRIP), Chiyoda, Tokyo 102-0075, Japan [2] Department of Physics, Nagoya University, Furo-cho, Nagoya 464-8602, Japan
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17
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Yi H, Wang Z, Chen C, Shi Y, Feng Y, Liang A, Xie Z, He S, He J, Peng Y, Liu X, Liu Y, Zhao L, Liu G, Dong X, Zhang J, Nakatake M, Arita M, Shimada K, Namatame H, Taniguchi M, Xu Z, Chen C, Dai X, Fang Z, Zhou XJ. Evidence of topological surface state in three-dimensional Dirac semimetal Cd3As2. Sci Rep 2014; 4:6106. [PMID: 25139455 PMCID: PMC4138522 DOI: 10.1038/srep06106] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 07/30/2014] [Indexed: 11/09/2022] Open
Abstract
The three-dimensional topological semimetals represent a new quantum state of matter. Distinct from the surface state in the topological insulators that exhibits linear dispersion in two-dimensional momentum plane, the three-dimensional semimetals host bulk band dispersions linearly along all directions. In addition to the gapless points in the bulk, the three-dimensional Weyl/Dirac semimetals are also characterized by "topologically protected" surface state with Fermi arcs on their surface. While Cd3As2 is proposed to be a viable candidate of a Dirac semimetal, more investigations are necessary to pin down its nature. In particular, the topological surface state, the hallmark of the three-dimensional semimetal, has not been observed in Cd3As2. Here we report the electronic structure of Cd3As2 investigated by angle-resolved photoemission measurements on the (112) crystal surface and detailed band structure calculations. The measured Fermi surface and band structure show a good agreement with the band structure calculations with two bulk Dirac-like bands approaching the Fermi level and forming Dirac points near the Brillouin zone center. Moreover, the topological surface state with a linear dispersion approaching the Fermi level is identified for the first time. These results provide experimental indications on the nature of topologically non-trivial three-dimensional Dirac cones in Cd3As2.
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Affiliation(s)
- Hemian Yi
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhijun Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Chaoyu Chen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Youguo Shi
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Ya Feng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Aiji Liang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhuojin Xie
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Shaolong He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Junfeng He
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yingying Peng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xu Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yan Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lin Zhao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Guodong Liu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaoli Dong
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jun Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - M Nakatake
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
| | - M Arita
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
| | - K Shimada
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
| | - H Namatame
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
| | - M Taniguchi
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
| | - Zuyan Xu
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chuangtian Chen
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xi Dai
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhong Fang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - X J Zhou
- 1] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China [2] Collaborative Innovation Center of Quantum Matter, Beijing, China
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18
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Zhu ZH, Veenstra CN, Zhdanovich S, Schneider MP, Okuda T, Miyamoto K, Zhu SY, Namatame H, Taniguchi M, Haverkort MW, Elfimov IS, Damascelli A. Photoelectron spin-polarization control in the topological insulator Bi2Se3. Phys Rev Lett 2014; 112:076802. [PMID: 24579623 DOI: 10.1103/physrevlett.112.076802] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Indexed: 06/03/2023]
Abstract
We study the manipulation of the spin polarization of photoemitted electrons in Bi2Se3 by spin- and angle-resolved photoemission spectroscopy. General rules are established that enable controlling the photoelectron spin-polarization. We demonstrate the ± 100% reversal of a single component of the measured spin-polarization vector upon the rotation of light polarization, as well as full three-dimensional manipulation by varying experimental configuration and photon energy. While a material-specific density-functional theory analysis is needed for the quantitative description, a minimal yet fully generalized two-atomic-layer model qualitatively accounts for the spin response based on the interplay of optical selection rules, photoelectron interference, and topological surface-state complex structure. It follows that photoelectron spin-polarization control is generically achievable in systems with a layer-dependent, entangled spin-orbital texture.
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Affiliation(s)
- Z-H Zhu
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - C N Veenstra
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - S Zhdanovich
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - M P Schneider
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - T Okuda
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - K Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - S-Y Zhu
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - H Namatame
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
| | - M Taniguchi
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan and Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - M W Haverkort
- Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany and Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - I S Elfimov
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada and Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - A Damascelli
- Department of Physics & Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada and Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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19
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Anzai H, Ino A, Arita M, Namatame H, Taniguchi M, Ishikado M, Fujita K, Ishida S, Uchida S. Relation between the nodal and antinodal gap and critical temperature in superconducting Bi2212. Nat Commun 2013; 4:1815. [PMID: 23652003 PMCID: PMC3674243 DOI: 10.1038/ncomms2805] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 03/24/2013] [Indexed: 12/05/2022] Open
Abstract
An energy gap is, in principle, a dominant parameter in superconductivity. However, this view has been challenged for the case of high-Tc cuprates, because anisotropic evolution of a d-wave-like superconducting gap with underdoping has been difficult to formulate along with a critical temperature Tc. Here we show that a nodal-gap energy 2ΔN closely follows 8.5 kBTc with underdoping and is also proportional to the product of an antinodal gap energy Δ* and a square-root superfluid density √Ps for Bi2Sr2CaCu2O8+δ, using low-energy synchrotron-radiation angle-resolved photoemission. The quantitative relations imply that the distinction between the nodal and antinodal gaps stems from the separation of the condensation and formation of electron pairs, and that the nodal-gap suppression represents the substantial phase incoherence inherent in a strong-coupling superconducting state. These simple gap-based formulae reasonably describe a crucial part of the unconventional mechanism governing Tc. In conventional superconductors, the critical temperature is proportional to the superconducting energy gap, but this is not so in unconventional superconductors. Anzai et al. identify an alternative relationship involving nodal and antinodal gaps in an underdoped cuprate superconductor.
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Affiliation(s)
- H Anzai
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
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20
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Tabayashi K, Takahashi O, Namatame H, Taniguchi M. Substituent R-effects on the core–electron excitation spectra of hydrogen-bonded carboxylic-acid (R–COOH) clusters: Comparison between acetic-acid and formic-acid clusters. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.10.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Miyamoto K, Kimura A, Okuda T, Miyahara H, Kuroda K, Namatame H, Taniguchi M, Eremeev SV, Menshchikova TV, Chulkov EV, Kokh KA, Tereshchenko OE. Topological surface states with persistent high spin polarization across the Dirac point in Bi2Te2Se and Bi2Se2Te. Phys Rev Lett 2012; 109:166802. [PMID: 23215110 DOI: 10.1103/physrevlett.109.166802] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Indexed: 06/01/2023]
Abstract
Helical spin textures with marked spin polarizations of topological surface states have been unveiled for the first time by state-of-the-art spin- and angle-resolved photoemission spectroscopy for two promising topological insulators, Bi(2)Te(2)Se and Bi(2)Se(2)Te. Their highly spin-polarized natures are found to be persistent across the Dirac point in both compounds. This novel finding paves a pathway to extending the utilization of topological surface states of these compounds for future spintronic applications.
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Affiliation(s)
- K Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan.
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22
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Iwasawa H, Yoshida Y, Hase I, Shimada K, Namatame H, Taniguchi M, Aiura Y. High-energy anomaly in the band dispersion of the ruthenate superconductor. Phys Rev Lett 2012; 109:066404. [PMID: 23006289 DOI: 10.1103/physrevlett.109.066404] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 03/30/2012] [Indexed: 06/01/2023]
Abstract
We reveal a "high-energy anomaly" (HEA) in the band dispersion of the unconventional ruthenate superconductor Sr2RuO4, by means of high-resolution angle-resolved photoemission spectroscopy (ARPES) with tunable energy and polarization of incident photons. This observation provides another class of correlated materials exhibiting this anomaly beyond high-T(c) cuprates. We demonstrate that two distinct types of band renormalization associated with and without the HEA occur as a natural consequence of the energetics in the bandwidth and the energy scale of the HEA. Our results are well reproduced by a simple analytical form of the self-energy based on the Fermi-liquid theory, indicating that the HEA exists at a characteristic energy scale of the multielectron excitations. We propose that the HEA universally emerges if the systems have such a characteristic energy scale inside of the bandwidth.
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Affiliation(s)
- H Iwasawa
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan.
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23
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Kuroda K, Miyahara H, Ye M, Eremeev SV, Koroteev YM, Krasovskii EE, Chulkov EV, Hiramoto S, Moriyoshi C, Kuroiwa Y, Miyamoto K, Okuda T, Arita M, Shimada K, Namatame H, Taniguchi M, Ueda Y, Kimura A. Experimental verification of PbBi2Te4 as a 3D topological insulator. Phys Rev Lett 2012; 108:206803. [PMID: 23003165 DOI: 10.1103/physrevlett.108.206803] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Indexed: 06/01/2023]
Abstract
The experimental evidence is presented of the topological insulator state in PbBi2Te4. A single surface Dirac cone is observed by angle-resolved photoemission spectroscopy with synchrotron radiation. Topological invariants Z2 are calculated from the ab initio band structure to be 1;(111). The observed two-dimensional isoenergy contours in the bulk energy gap are found to be the largest among the known three-dimensional topological insulators. This opens a pathway to achieving a sufficiently large spin current density in future spintronic devices.
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Affiliation(s)
- K Kuroda
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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24
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Miyamoto K, Kimura A, Kuroda K, Okuda T, Shimada K, Namatame H, Taniguchi M, Donath M. Spin-polarized Dirac-cone-like surface state with d character at W(110). Phys Rev Lett 2012; 108:066808. [PMID: 22401107 DOI: 10.1103/physrevlett.108.066808] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Indexed: 05/31/2023]
Abstract
The surface of W(110) exhibits a Dirac-cone-like state with d character within a spin-orbit-induced symmetry gap. As a function of the wave vector parallel to the surface, it shows a nearly massless energy dispersion and a pronounced spin polarization, which is antisymmetric with respect to the Brillouin zone center. In addition, the observed constant energy contours are strongly anisotropic for all energies. This discovery opens new pathways to the study of surface spin-density waves arising from a strong Fermi surface nesting as well as d-electron-based topological properties.
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Affiliation(s)
- K Miyamoto
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Japan
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25
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Kim S, Ye M, Kuroda K, Yamada Y, Krasovskii EE, Chulkov EV, Miyamoto K, Nakatake M, Okuda T, Ueda Y, Shimada K, Namatame H, Taniguchi M, Kimura A. Surface scattering via bulk continuum states in the 3D topological insulator Bi2Se3. Phys Rev Lett 2011; 107:056803. [PMID: 21867088 DOI: 10.1103/physrevlett.107.056803] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 06/14/2011] [Indexed: 05/31/2023]
Abstract
We have performed scanning tunneling microscopy and differential tunneling conductance (dI/dV) mapping for the surface of the three-dimensional topological insulator Bi(2)Se(3). The fast Fourier transformation applied to the dI/dV image shows an electron interference pattern near Dirac node despite the general belief that the backscattering is well suppressed in the bulk energy gap region. The comparison of the present experimental result with theoretical surface and bulk band structures shows that the electron interference occurs through the scattering between the surface states near the Dirac node and the bulk continuum states.
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Affiliation(s)
- Sunghun Kim
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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26
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Ishizaka K, Bahramy MS, Murakawa H, Sakano M, Shimojima T, Sonobe T, Koizumi K, Shin S, Miyahara H, Kimura A, Miyamoto K, Okuda T, Namatame H, Taniguchi M, Arita R, Nagaosa N, Kobayashi K, Murakami Y, Kumai R, Kaneko Y, Onose Y, Tokura Y. Giant Rashba-type spin splitting in bulk BiTeI. Nat Mater 2011; 10:521-526. [PMID: 21685900 DOI: 10.1038/nmat3051] [Citation(s) in RCA: 225] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Accepted: 05/19/2011] [Indexed: 05/30/2023]
Abstract
There has been increasing interest in phenomena emerging from relativistic electrons in a solid, which have a potential impact on spintronics and magnetoelectrics. One example is the Rashba effect, which lifts the electron-spin degeneracy as a consequence of spin-orbit interaction under broken inversion symmetry. A high-energy-scale Rashba spin splitting is highly desirable for enhancing the coupling between electron spins and electricity relevant for spintronic functions. Here we describe the finding of a huge spin-orbit interaction effect in a polar semiconductor composed of heavy elements, BiTeI, where the bulk carriers are ruled by large Rashba-like spin splitting. The band splitting and its spin polarization obtained by spin- and angle-resolved photoemission spectroscopy are well in accord with relativistic first-principles calculations, confirming that the spin splitting is indeed derived from bulk atomic configurations. Together with the feasibility of carrier-doping control, the giant-Rashba semiconductor BiTeI possesses excellent potential for application to various spin-dependent electronic functions.
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Affiliation(s)
- K Ishizaka
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
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27
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Shimojima T, Sakaguchi F, Ishizaka K, Ishida Y, Kiss T, Okawa M, Togashi T, Chen CT, Watanabe S, Arita M, Shimada K, Namatame H, Taniguchi M, Ohgushi K, Kasahara S, Terashima T, Shibauchi T, Matsuda Y, Chainani A, Shin S. Orbital-Independent Superconducting Gaps in Iron Pnictides. Science 2011; 332:564-7. [DOI: 10.1126/science.1202150] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- T. Shimojima
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda-ku, Tokyo 102-0075, Japan
| | - F. Sakaguchi
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - K. Ishizaka
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda-ku, Tokyo 102-0075, Japan
| | - Y. Ishida
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- JST, Transformative Research Project on Iron Pnictides, Chiyoda-ku, Tokyo 102-0075, Japan
| | - T. Kiss
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - M. Okawa
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - T. Togashi
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - C.-T. Chen
- Beijing Center for Crystal Research and Development, Chinese Academy of Science, Zhongguancun, Beijing 100190, China
| | - S. Watanabe
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - M. Arita
- Hiroshima Synchrotron Radiation Center and Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan
| | - K. Shimada
- Hiroshima Synchrotron Radiation Center and Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan
| | - H. Namatame
- Hiroshima Synchrotron Radiation Center and Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan
| | - M. Taniguchi
- Hiroshima Synchrotron Radiation Center and Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan
| | - K. Ohgushi
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- JST, Transformative Research Project on Iron Pnictides, Chiyoda-ku, Tokyo 102-0075, Japan
| | - S. Kasahara
- Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - T. Terashima
- Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - T. Shibauchi
- Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Y. Matsuda
- Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - A. Chainani
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - S. Shin
- Institute for Solid State Physics (ISSP), University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda-ku, Tokyo 102-0075, Japan
- JST, Transformative Research Project on Iron Pnictides, Chiyoda-ku, Tokyo 102-0075, Japan
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
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Anzai H, Ino A, Kamo T, Fujita T, Arita M, Namatame H, Taniguchi M, Fujimori A, Shen ZX, Ishikado M, Uchida S. Energy-dependent enhancement of the electron-coupling spectrum of the underdoped Bi2Sr2CaCu2O(8+δ) superconductor. Phys Rev Lett 2010; 105:227002. [PMID: 21231415 DOI: 10.1103/physrevlett.105.227002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Indexed: 05/30/2023]
Abstract
We have determined the electron-coupling spectrum of superconducting Bi2Sr2CaCu2O(8+δ) from high-resolution angle-resolved photoemission spectra by two deconvolution-free robust methods. As hole concentration decreases, the coupling spectral weight at low energies ≲15 meV shows a twofold and nearly band-independent enhancement, while that around ∼65 meV increases moderately, and that in ≳130 meV decreases leading to a crossover of dominant coupling excitation between them. Our results suggest the competition among multiple screening effects, and provide important clues to the source of sufficiently strong low-energy coupling, λ(LE)≈1, in an underdoped system.
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Affiliation(s)
- H Anzai
- Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
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29
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Iwasawa H, Yoshida Y, Hase I, Koikegami S, Hayashi H, Jiang J, Shimada K, Namatame H, Taniguchi M, Aiura Y. Interplay among Coulomb interaction, spin-orbit interaction, and multiple electron-boson interactions in Sr2RuO4. Phys Rev Lett 2010; 105:226406. [PMID: 21231406 DOI: 10.1103/physrevlett.105.226406] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Indexed: 05/30/2023]
Abstract
Using polarization- and hν-dependent angle-resolved photoemission spectroscopy, we uncovered the fine details of a quasiparticle's dynamics of a typical multiband superconductor, Sr2RuO4. We found strong hybridization between the in-plane and out-of-plane quasiparticles via the Coulomb and spin-orbit interactions. This effect enhances the quasiparticle mass due to the inflow of out-of-plane quasiparticles into the two-dimensional Fermi surface sheet, where the quasiparticles are further subjected to the multiple electron-boson interactions. We suggest that the spin-triplet p-wave superconductivity of Sr2RuO4 is phonon mediated.
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Affiliation(s)
- H Iwasawa
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan.
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30
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Kuroda K, Ye M, Kimura A, Eremeev SV, Krasovskii EE, Chulkov EV, Ueda Y, Miyamoto K, Okuda T, Shimada K, Namatame H, Taniguchi M. Experimental realization of a three-dimensional topological insulator phase in ternary chalcogenide TlBiSe₂. Phys Rev Lett 2010; 105:146801. [PMID: 21230855 DOI: 10.1103/physrevlett.105.146801] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Indexed: 05/30/2023]
Abstract
We report the first observation of a topological surface state on the (111) surface of the ternary chalcogenide TlBiSe₂ by angle-resolved photoemission spectroscopy. By tuning the synchrotron radiation energy we reveal that it features an almost ideal Dirac cone with the Dirac point well isolated from bulk continuum states. This suggests that TlBiSe₂ is a promising material for realizing quantum topological transport.
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Affiliation(s)
- K Kuroda
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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31
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He C, Zhang Y, Xie BP, Wang XF, Yang LX, Zhou B, Chen F, Arita M, Shimada K, Namatame H, Taniguchi M, Chen XH, Hu JP, Feng DL. Electronic-structure-driven magnetic and structure transitions in superconducting NaFeAs single crystals measured by angle-resolved photoemission spectroscopy. Phys Rev Lett 2010; 105:117002. [PMID: 20867599 DOI: 10.1103/physrevlett.105.117002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2010] [Revised: 06/14/2010] [Indexed: 05/29/2023]
Abstract
The electronic structure of NaFeAs is studied with angle-resolved photoemission spectroscopy on high quality single crystals. Large portions of the band structure start to shift around the structural transition temperature and smoothly evolve as the temperature lowers through the spin density wave transition. Moreover, band folding due to magnetic order emerges slightly above the structural transition. Our observation provides direct evidence that the structural and magnetic transitions share the same origin and could both be driven by the electronic structure reconstruction in Fe-based superconductors instead of Fermi surface nesting. We did not observe any sign of a gap in the superconducting state, which is likely related to weakened superconductivity in the presence of the spin density wave.
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Affiliation(s)
- C He
- State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People's Republic of China
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32
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Zhang Y, Yang LX, Chen F, Zhou B, Wang XF, Chen XH, Arita M, Shimada K, Namatame H, Taniguchi M, Hu JP, Xie BP, Feng DL. Out-of-plane momentum and symmetry-dependent energy gap of the pnictide Ba0.6K0.4Fe2As2 superconductor revealed by angle-resolved photoemission spectroscopy. Phys Rev Lett 2010; 105:117003. [PMID: 20867600 DOI: 10.1103/physrevlett.105.117003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2010] [Indexed: 05/29/2023]
Abstract
The three-dimensional band structure and superconducting gap of Ba0.6K0.4Fe2As2 are studied with angle-resolved photoemission spectroscopy. In contrast with previous results, we have identified three holelike Fermi surface sheets near the zone center with sizable out-of-plane or kz dispersion. The superconducting gap on certain Fermi surface sheets shows significant kz dependence. Moreover, the superconducting gap sizes are different at the same Fermi momentum for two bands with different spatial symmetries (one odd, one even). Our results further reveal the three-dimensional and orbital-dependent structure of the superconducting gap in iron pnictides, which facilitates the understanding of momentum-integrated measurements and provides a distinct test for theories.
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Affiliation(s)
- Y Zhang
- State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People's Republic of China
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33
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Kuroda K, Arita M, Miyamoto K, Ye M, Jiang J, Kimura A, Krasovskii EE, Chulkov EV, Iwasawa H, Okuda T, Shimada K, Ueda Y, Namatame H, Taniguchi M. Hexagonally deformed Fermi surface of the 3D topological insulator Bi2Se3. Phys Rev Lett 2010; 105:076802. [PMID: 20868066 DOI: 10.1103/physrevlett.105.076802] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Indexed: 05/29/2023]
Abstract
A hexagonal deformation of the Fermi surface of Bi2Se3 has been for the first time observed by angle-resolved photoemission spectroscopy. This is in contrast to the general belief that Bi2Se3 possesses an ideal Dirac cone. The hexagonal shape is found to disappear near the Dirac node, which would protect the surface state electrons from backscattering. It is also demonstrated that the Fermi energy of naturally electron-doped Bi2Se3 can be tuned by 1% Mg doping in order to realize the quantum topological transport.
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Affiliation(s)
- K Kuroda
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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34
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Kimura A, Krasovskii EE, Nishimura R, Miyamoto K, Kadono T, Kanomaru K, Chulkov EV, Bihlmayer G, Shimada K, Namatame H, Taniguchi M. Strong rashba-type spin polarization of the photocurrent from bulk continuum States: experiment and theory for Bi(111). Phys Rev Lett 2010; 105:076804. [PMID: 20868068 DOI: 10.1103/physrevlett.105.076804] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Indexed: 05/29/2023]
Abstract
Strong spin polarization of the photocurrent from bulk continuum states of Bi(111) is experimentally observed. On the basis of ab initio one-step photoemission theory the effect is shown to originate from the strong polarization of the initial states at the surface and to be the result of the surface sensitivity of photoemission. Final state effects cause deviations of the k{∥} dependence of polarization from strictly antisymmetric relative to Γ.
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Affiliation(s)
- A Kimura
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
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35
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Ideta S, Takashima K, Hashimoto M, Yoshida T, Fujimori A, Anzai H, Fujita T, Nakashima Y, Ino A, Arita M, Namatame H, Taniguchi M, Ono K, Kubota M, Lu DH, Shen ZX, Kojima KM, Uchida S. Enhanced superconducting gaps in the trilayer high-temperature Bi2Sr2Ca2Cu3O(10+δ) cuprate superconductor. Phys Rev Lett 2010; 104:227001. [PMID: 20867198 DOI: 10.1103/physrevlett.104.227001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2009] [Indexed: 05/29/2023]
Abstract
We report the first observation of the multilayer band splitting in the optimally doped trilayer cuprate Bi2Sr2Ca2Cu3O(10+δ) (Bi2223) by angle-resolved photoemission spectroscopy. The observed energy bands and Fermi surfaces are originated from the outer and inner CuO2 planes (OP and IP). The OP band is overdoped with a large d-wave gap around the node of Δ0∼43 meV while the IP is underdoped with an even large gap of Δ0∼60 meV. These energy gaps are much larger than those for the same doping level of the double-layer cuprates, which leads to the large Tc in Bi2223. We propose possible origins of the large superconducting gaps for the OP and IP: (1) minimal influence of out-of-plane disorder and a proximity effect and (2) interlayer tunneling of Cooper pairs between the OP and IP.
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Affiliation(s)
- S Ideta
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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36
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Kutluk G, Nakatake M, Sumuda H, Namatame H, Taniguchi M. Electronic structure of self-assembled Sm nanostructure on HOPG studied by in-situ photoemission spectroscopy and scanning probe microscopy. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Sudayama T, Wakisaka Y, Takubo K, Morinaga R, Sato TJ, Arita M, Namatame H, Taniguchi M, Mizokawa T. Band structure of the heavily-electron-doped FeAs-based Ba(Fe,Co)2As2 superconductor suppresses antiferromagnetic correlations. Phys Rev Lett 2010; 104:177002. [PMID: 20482128 DOI: 10.1103/physrevlett.104.177002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Indexed: 05/29/2023]
Abstract
In the heavily-electron-doped regime of the Ba(Fe,Co)2As2 superconductor, three hole bands at the zone center are observed and two of them reach the Fermi level. The larger hole pocket at the zone center is apparently nested with the smaller electron pocket around the zone corner. However, the (pi,0) Fermi surface reconstruction reported for the hole-doped case is absent in the heavily-electron-doped case. This observation shows that the apparent Fermi surface nesting alone is not enough to enhance the antiferromagnetic correlation as well as the superconducting transition temperature.
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Affiliation(s)
- T Sudayama
- Department of Physics and Department of Complexity Science and Engineering, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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38
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Ye M, Kimura A, Miura Y, Shirai M, Cui YT, Shimada K, Namatame H, Taniguchi M, Ueda S, Kobayashi K, Kainuma R, Shishido T, Fukushima K, Kanomata T. Role of electronic structure in the martensitic phase transition of Ni2Mn(1+x)Sn(1-x) studied by hard-X-ray photoelectron spectroscopy and Ab initio calculation. Phys Rev Lett 2010; 104:176401. [PMID: 20482119 DOI: 10.1103/physrevlett.104.176401] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Indexed: 05/29/2023]
Abstract
We have revealed the underlying mechanism of the martensitic phase transition (MPT) in a new class of ferromagnetic shape memory alloys, Ni2Mn1+xSn1-x, by the combination of bulk-sensitive hard-x-ray photoelectron spectroscopy and a first-principles density-functional calculation. The Ni 3d e{g} state in the cubic phase systematically shifts towards the Fermi energy with an increase in the number of Mn atoms substituted in the Sn sites. An abrupt decrease of the intensity of the Ni 3d e{g} states upon MPT for x=0.36-0.42 has been observed in the vicinity of the Fermi level. The energy shift of the Ni 3d minority-spin e{g} state in the cubic phase originates from hybridization with the antiferromagnetically coupled Mn in the Sn site. Below the MPT temperature, the Ni 3d state splits into two levels located below and above the Fermi energy in order to achieve an energetically stable state.
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Affiliation(s)
- M Ye
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan
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39
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Chen Y, Iyo A, Yang W, Ino A, Arita M, Johnston S, Eisaki H, Namatame H, Taniguchi M, Devereaux TP, Hussain Z, Shen ZX. Unusual layer-dependent charge distribution, collective mode coupling, and superconductivity in multilayer cuprate Ba2Ca3Cu4O8F2. Phys Rev Lett 2009; 103:036403. [PMID: 19659301 DOI: 10.1103/physrevlett.103.036403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Indexed: 05/28/2023]
Abstract
Low energy ultrahigh momentum resolution angle resolved photoemission spectroscopy study on four-layer self-doped high Tc superconductor Ba2Ca3Cu4O8F2 (F0234) revealed fine structure in the band dispersion, identifying the unconventional association of hole and electron doping with the inner and outer CuO2 layers, respectively. For the states originating from two inequivalent CuO2 layers, different energy scales are observed in dispersion kinks associated with the collective mode coupling, with the larger energy scale found in the electron (n-) doped state which also has stronger coupling strength. Given the earlier finding that the superconducting gap is substantially larger along the n-type Fermi surface, our observations connect the mode coupling energy and strength with magnitude of the pairing gap.
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Affiliation(s)
- Yulin Chen
- SIMES, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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40
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Wakisaka Y, Sudayama T, Takubo K, Mizokawa T, Arita M, Namatame H, Taniguchi M, Katayama N, Nohara M, Takagi H. Excitonic insulator state in Ta2NiSe5 probed by photoemission spectroscopy. Phys Rev Lett 2009; 103:026402. [PMID: 19659224 DOI: 10.1103/physrevlett.103.026402] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Indexed: 05/28/2023]
Abstract
We report on a photoemission study of Ta2NiSe5 that has a quasi-one-dimensional structure and an insulating ground state. Ni 2p core-level spectra show that the Ni 3d subshell is partially occupied and the Ni 3d states are heavily hybridized with the Se 4p states. In angle-resolved photoemission spectra, the valence-band top is found to be extremely flat, indicating that the ground state can be viewed as an excitonic insulator state between the Ni 3d-Se 4p hole and the Ta 5d electron. We argue that the high atomic polarizability of Se plays an important role to stabilize the excitonic state.
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Affiliation(s)
- Y Wakisaka
- Department of Physics, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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41
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Zhang Y, Wei J, Ou HW, Zhao JF, Zhou B, Chen F, Xu M, He C, Wu G, Chen H, Arita M, Shimada K, Namatame H, Taniguchi M, Chen XH, Feng DL. Unusual doping dependence of the electronic structure and coexistence of spin-density-wave and superconductor phases in single crystalline Sr1-xKxFe2As2. Phys Rev Lett 2009; 102:127003. [PMID: 19392313 DOI: 10.1103/physrevlett.102.127003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2008] [Indexed: 05/27/2023]
Abstract
The nature of the spin-density wave (SDW) and its relation with superconductivity are crucial issues in the newly discovered iron-pnictide superconductors. Particularly, it is unclear whether the superconducting phase and SDW are truly exclusive from each other. We here report splittings of the band structures in Sr1-xKxFe2As2 (x=0, 0.1, 0.18), and their unusual doping dependence. Our data on single crystalline samples prove that the SDW and superconductivity could coexist in iron pnictides.
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Affiliation(s)
- Y Zhang
- Department of Physics, Surface Physics Laboratory, Fudan University, Shanghai 200433, People's Republic of China
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42
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Ou HW, Zhao JF, Zhang Y, Xie BP, Shen DW, Zhu Y, Yang ZQ, Che JG, Luo XG, Chen XH, Arita M, Shimada K, Namatame H, Taniguchi M, Cheng CM, Tsuei KD, Feng DL. Novel electronic structure induced by a highly strained oxide interface with incommensurate crystal fields. Phys Rev Lett 2009; 102:026806. [PMID: 19257306 DOI: 10.1103/physrevlett.102.026806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2008] [Indexed: 05/27/2023]
Abstract
The misfit oxide, Bi2Ba1.3K0.6Co2.1O7.94, made of alternating rocksalt-structured [BiO/BaO] layers and hexagonal CoO2 layers, was studied by angle-resolved photoemission spectroscopy, revealing the electronic structure of a highly strained oxide interface. We found that low-energy states are confined within individual sides of the interface, but scattered by the incommensurate crystal field from the other side. Furthermore, the high strain on the rocksalt layer induces large charge transfer to the CoO2 layer, and a novel effect, the interfacial enhancement of electron-phonon interactions, is discovered.
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Affiliation(s)
- H W Ou
- Surface Physics Laboratory (National key laboratory) and Physics Department, Fudan University, Shanghai 200433, PR China
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43
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Shen DW, Zhang Y, Yang LX, Wei J, Ou HW, Dong JK, Xie BP, He C, Zhao JF, Zhou B, Arita M, Shimada K, Namatame H, Taniguchi M, Shi J, Feng DL. Primary role of the barely occupied states in the charge density wave formation of NbSe2. Phys Rev Lett 2008; 101:226406. [PMID: 19113497 DOI: 10.1103/physrevlett.101.226406] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2008] [Indexed: 05/27/2023]
Abstract
NbSe2 is a prototypical charge-density-wave (CDW) material, whose mechanism remains mysterious so far. With angle resolved photoemission spectroscopy, we recovered the long-lost nesting condition over a large broken-honeycomb region in the Brillouin zone, which consists of six saddle band point regions with high density of states (DOS), and large regions away from Fermi surfaces with negligible DOS at the Fermi energy. We show that the major contributions to the CDW formation come from these barely occupied states rather than the saddle band points. Our findings not only resolve a long-standing puzzle, but also overthrow the conventional wisdom that CDW is dominated by regions with high DOS.
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Affiliation(s)
- D W Shen
- Department of Physics, Surface Physics Laboratory National Key Laboratory and Advanced Materials Laboratory, Fudan University, Shanghai 200433, P. R. China.
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44
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Iwasawa H, Douglas JF, Sato K, Masui T, Yoshida Y, Sun Z, Eisaki H, Bando H, Ino A, Arita M, Shimada K, Namatame H, Taniguchi M, Tajima S, Uchida S, Saitoh T, Dessau DS, Aiura Y. Isotopic fingerprint of electron-phonon coupling in high-Tc cuprates. Phys Rev Lett 2008; 101:157005. [PMID: 18999630 DOI: 10.1103/physrevlett.101.157005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Indexed: 05/27/2023]
Abstract
Angle-resolved photoemission spectroscopy with low-energy tunable photons along the nodal direction of oxygen isotope substituted Bi(2)Sr(2)CaCu(2)O(8+delta) reveals a distinct oxygen isotope shift near the electron-boson coupling "kink" in the electronic dispersion. The magnitude (a few meV) and direction of the kink shift are as expected due to the measured isotopic shift of phonon frequency, and are also in agreement with theoretical expectations. This demonstrates the participation of the phonons as dominant players, as well as pinpointing the most relevant of the phonon branches.
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Affiliation(s)
- H Iwasawa
- Department of Applied Physics, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
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45
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Wei J, Zhang Y, Ou HW, Xie BP, Shen DW, Zhao JF, Yang LX, Arita M, Shimada K, Namatame H, Taniguchi M, Yoshida Y, Eisaki H, Feng DL. Superconducting coherence peak in the electronic excitations of a single-layer Bi2Sr1.6La0.4CuO6+delta cuprate superconductor. Phys Rev Lett 2008; 101:097005. [PMID: 18851643 DOI: 10.1103/physrevlett.101.097005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2008] [Indexed: 05/26/2023]
Abstract
Angle resolved photoemission spectroscopy study is reported on a high quality optimally doped Bi2Sr1.6La0.4CuO6+delta high-Tc superconductor. In the antinodal region with a maximal d-wave gap, the symbolic superconducting coherence peak, which has been widely observed in multi-CuO2-layer cuprate superconductors, is unambiguously observed in a single-layer system. The associated peak-dip separation is just about 19 meV, which is much smaller than its counterparts in multilayered compounds, but correlates with the energy scales of spin excitations in single-layer cuprates.
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Affiliation(s)
- J Wei
- Department of Physics, Surface Physics Laboratory (National Key Laboratory), Fudan University, Shanghai 200433, People's Republic of China
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46
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Nomoto T, Sumi O, Yagi S, Soda K, Namatame H, Taniguchi M. Coadsorption reaction between (CH3)2S and H2O on Rh(100) studied by NEXAFS and XPS. SURF INTERFACE ANAL 2008. [DOI: 10.1002/sia.2614] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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47
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Zhao JF, Ou HW, Wu G, Xie BP, Zhang Y, Shen DW, Wei J, Yang LX, Dong JK, Arita M, Namatame H, Taniguchi M, Chen XH, Feng DL. Evolution of the electronic structure of 1T-Cu(x)TiSe(2). Phys Rev Lett 2007; 99:146401. [PMID: 17930690 DOI: 10.1103/physrevlett.99.146401] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Indexed: 05/25/2023]
Abstract
The electronic structure of a new charge-density-wave system or superconductor, 1T-Cu(x)TiSe(2), has been studied by photoemission spectroscopy. A correlated semiconductor band structure is revealed for the undoped case, which resolves a long-standing controversy in the system. With Cu doping, the charge-density wave is suppressed by the raising of the chemical potential, while the superconductivity is enhanced by the enhancement of the density of states, and possibly suppressed at higher doping by the strong scattering.
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Affiliation(s)
- J F Zhao
- Department of Physics, Applied Surface Physics State Key Laboratory, and Advanced Materials Laboratory, Fudan University, Shanghai, PR China
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48
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Xie BP, Yang K, Shen DW, Zhao JF, Ou HW, Wei J, Gu SY, Arita M, Qiao S, Namatame H, Taniguchi M, Kaneko N, Eisaki H, Tsuei KD, Cheng CM, Vobornik I, Fujii J, Rossi G, Yang ZQ, Feng DL. High-energy scale revival and giant kink in the dispersion of a cuprate superconductor. Phys Rev Lett 2007; 98:147001. [PMID: 17501304 DOI: 10.1103/physrevlett.98.147001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2006] [Indexed: 05/15/2023]
Abstract
In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure calculation very well. Similar behavior observed in blue bronze and the Mott insulator Ca2CuO2Cl2 suggests that the origin of hopping-dominated dispersion in an overdoped cuprate might be quite complicated. A giant kink in the dispersion is observed, and the complete self-energy containing all interaction information is extracted for a doped cuprate. These results recovered significant missing pieces in our current understanding of the electronic structure of cuprates.
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Affiliation(s)
- B P Xie
- Department of Physics, Applied Surface Physics State Key Laboratory, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
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49
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Eguchi R, Kiss T, Tsuda S, Shimojima T, Mizokami T, Yokoya T, Chainani A, Shin S, Inoue IH, Togashi T, Watanabe S, Zhang CQ, Chen CT, Arita M, Shimada K, Namatame H, Taniguchi M. Bulk- and surface-sensitive high-resolution photoemission study of two mott-hubbard systems: SrVO3 and CaVO3. Phys Rev Lett 2006; 96:076402. [PMID: 16606115 DOI: 10.1103/physrevlett.96.076402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2005] [Indexed: 05/08/2023]
Abstract
We study the electronic structure of Mott-Hubbard systems SrVO3 and CaVO3 with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp (hv = 7-21 eV). A systematic suppression of the density of states (DOS) within approximately 0.2 eV of the Fermi level (EF) is found on decreasing photon energy, i.e., on increasing bulk sensitivity. The coherent band in SrVO3 and CaVO3 is shown to consist of surface and bulk-derived features, separated in energy. The stronger distortion on surface of CaVO3 compared to SrVO3 leads to a higher surface metallicity in the coherent DOS at EF, consistent with recent theory.
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Affiliation(s)
- R Eguchi
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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50
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Iwasawa H, Yamakawa K, Saitoh T, Inaba J, Katsufuji T, Higashiguchi M, Shimada K, Namatame H, Taniguchi M. Electronic structure of charge- and spin-controlled Sr(1-(x+y))La(x+y)Ti(1-x)Cr(x)O3. Phys Rev Lett 2006; 96:067203. [PMID: 16606039 DOI: 10.1103/physrevlett.96.067203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2005] [Indexed: 05/08/2023]
Abstract
We present the electronic structure of Sr(1-(x+y))La(x+y)Ti(1-x)Cr(x)O3 investigated by high-resolution photoemission spectroscopy. In the vicinity of the Fermi level, it was found that the electronic structure was composed of a Cr 3d local state with the t(2g)3 configuration and a Ti 3d itinerant state. The energy levels of these Cr and Ti 3d states are well interpreted by the difference of the charge-transfer energy of both ions. The spectral weight of the Cr 3d state is completely proportional to the spin concentration x irrespective of the carrier concentration y, indicating that the spin density can be controlled by x as desired. In contrast, the spectral weight of the Ti 3d state is not proportional to y, depending on the amount of Cr doping.
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Affiliation(s)
- H Iwasawa
- Department of Applied Physics, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
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