1
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Jose GC, Xie W, Lavina B, Zhao J, Alp EE, Zhang D, Bi W. Robust magnetism and crystal structure in Dirac semimetal EuMnBi 2under high pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:255802. [PMID: 38534017 DOI: 10.1088/1361-648x/ad3473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 03/15/2024] [Indexed: 03/28/2024]
Abstract
Dirac materials offer exciting opportunities to explore low-energy carrier dynamics and novel physical phenomena, especially their interaction with magnetism. In this context, this work focuses on studies of pressure control on the magnetic state of EuMnBi2, a representative magnetic Dirac semimetal, through time-domain synchrotron Mössbauer spectroscopy in151Eu. Contrary to the previous report that the antiferromagnetic order is suppressed by pressure above 4 GPa, we have observed robust magnetic order up to 33.1 GPa. Synchrotron-based x-ray diffraction experiment on a pure EuMnBi2sample shows that the tetragonal crystal lattice remains stable up to at least 31.7 GPa.
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Affiliation(s)
- Greeshma C Jose
- Department of Physics, University of Alabama at Birmingham, Birmingham, AL 35294, United States of America
| | - Weiwei Xie
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, United States of America
| | - Barbara Lavina
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States of America
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL 60637, United States of America
| | - Jiyong Zhao
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States of America
| | - Esen E Alp
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States of America
| | - Dongzhou Zhang
- Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI 96822, United States of America
| | - Wenli Bi
- Department of Physics, University of Alabama at Birmingham, Birmingham, AL 35294, United States of America
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2
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Yang Y, Lu H, Yuan J, Liu Z, Jiang Z, Huang Z, Ding J, Liu J, Cho S, Liu J, Liu Z, Guo Y, Zheng Y, Shen D. Electronic structure and layer-dependent magnetic order of a new high-mobility layered antiferromagnet KMnBi. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:155801. [PMID: 36764004 DOI: 10.1088/1361-648x/acbb49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Room-temperature two-dimensional antiferromagnetic (AFM) materials are highly desirable for various device applications. In this letter, we report the low-energy electronic structure of KMnBi measured by angle-resolved photoemission spectroscopy, which confirms an AFM ground state with the valence band maximum located at -100 meV below the Fermi level and small hole effective masses associated with the sharp band dispersion. Using complementary Raman, atomic force microscope and electric transport measurement, we systematically study the evolution of electric transport characteristics of micro-mechanically exfoliated KMnBi with varied flake thicknesses, which all consistently reveal the existence of a probable AFM ground state down to the quintuple-layer regime. The AFM phase transition temperature ranges from 220 K to 275 K, depending on the thickness. Our results suggest that with proper device encapsulation, multilayer KMnBi is indeed a promising 2D AFM platform for testing various theoretical proposals for device applications.
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Affiliation(s)
- Yichen Yang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Hengzhe Lu
- Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Jian Yuan
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
- ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Zhengtai Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhicheng Jiang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhe Huang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jianyang Ding
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jiayu Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Soohyun Cho
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jishan Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhonghao Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yanfeng Guo
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People's Republic of China
- ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University, Shanghai 201210, People's Republic of China
| | - Yi Zheng
- Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Dawei Shen
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, 42 South Hezuohua Road, Hefei 230029, People's Republic of China
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3
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Mazzola F, Ghosh B, Fujii J, Acharya G, Mondal D, Rossi G, Bansil A, Farias D, Hu J, Agarwal A, Politano A, Vobornik I. Discovery of a Magnetic Dirac System with a Large Intrinsic Nonlinear Hall Effect. NANO LETTERS 2023; 23:902-907. [PMID: 36689192 PMCID: PMC10064332 DOI: 10.1021/acs.nanolett.2c04194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Magnetic materials exhibiting topological Dirac fermions are attracting significant attention for their promising technological potential in spintronics. In these systems, the combined effect of the spin-orbit coupling and magnetic order enables the realization of novel topological phases with exotic transport properties, including the anomalous Hall effect and magneto-chiral phenomena. Herein, we report experimental signature of topological Dirac antiferromagnetism in TaCoTe2 via angle-resolved photoelectron spectroscopy and first-principles density functional theory calculations. In particular, we find the existence of spin-orbit coupling-induced gaps at the Fermi level, consistent with the manifestation of a large intrinsic nonlinear Hall conductivity. Remarkably, we find that the latter is extremely sensitive to the orientation of the Néel vector, suggesting TaCoTe2 as a suitable candidate for the realization of non-volatile spintronic devices with an unprecedented level of intrinsic tunability.
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Affiliation(s)
- Federico Mazzola
- CNR-IOM
TASC Laboratory, Area Science Park, 34149Trieste, Italy
- Department
of Molecular Sciences and Nanosystems, Ca’
Foscari University of Venice, 30172Venice, Italy
| | - Barun Ghosh
- Department
of Physics, Northeastern University, Boston, Massachusetts02115, United States
| | - Jun Fujii
- CNR-IOM
TASC Laboratory, Area Science Park, 34149Trieste, Italy
| | - Gokul Acharya
- Department
of Physics, University of Arkansas, Fayetteville, Arkansas72701, United States
| | - Debashis Mondal
- CNR-IOM
TASC Laboratory, Area Science Park, 34149Trieste, Italy
| | | | - Arun Bansil
- Department
of Physics, Northeastern University, Boston, Massachusetts02115, United States
| | - Daniel Farias
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049Madrid, Spain
- Instituto
“Nicolás Cabrera” and Condensed Matter Physics
Center (IFIMAC), Universidad Autónoma
de Madrid, 28049Madrid, Spain
| | - Jin Hu
- Department
of Physics, University of Arkansas, Fayetteville, Arkansas72701, United States
| | - Amit Agarwal
- Department
of Physics, Indian Institute of Technology
Kanpur, Kanpur208016, India
| | - Antonio Politano
- Department
of Physical and Chemical Sciences, University
of L’Aquila, Via
Vetoio, 67100L’Aquila, Italy
| | - Ivana Vobornik
- CNR-IOM
TASC Laboratory, Area Science Park, 34149Trieste, Italy
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4
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Kang B, Liu Z, Zhao D, Zheng L, Sun Z, Li J, Wang Z, Wu T, Chen X. Giant Negative Magnetoresistance beyond Chiral Anomaly in Topological Material YCuAs 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2201597. [PMID: 35583233 DOI: 10.1002/adma.202201597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/06/2022] [Indexed: 06/15/2023]
Abstract
The large negative magnetoresistance (MR) effect, which usually emerges in various magnetic systems, is a technologically important property for spintronics. Recently, the so-called "chiral anomaly" in topological semimetals offers an alternative to generate a considerable negative MR effect without utilizing magnetism. However, it requires that the applied magnetic field must be strictly along the electric current direction, which sets a strong limit for practical applications. Here, a giant negative MR effect is discovered with a value of up to -40% in 9 T at 2 K in the nonmagnetic Dirac material YCuAs2 , which is not restricted to the specific configuration for applied magnetic fields. Based on magnetic susceptibility and NMR measurements, the giant negative MR effect is tightly connected with the unexpected spin-dependent scattering from vacancy-induced local moments, which is also beyond the classical Kondo effect. The present work not only offers an alternative route for spintronics based on nonmagnetic topological materials, but also helps to further understand the negative MR effect in topological materials.
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Affiliation(s)
- Baolei Kang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zhao Liu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Dan Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Lixuan Zheng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zeliang Sun
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Jian Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zhengfei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Tao Wu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
- CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai, 200050, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Xianhui Chen
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
- CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai, 200050, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
- CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei, Anhui, 230026, China
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5
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Zeferino AS, Mira AR, Delgadinho M, Brito M, Ponte T, Ribeiro E. Drug Resistance and Epigenetic Modulatory Potential of Epigallocatechin-3-Gallate Against Staphylococcus aureus. Curr Microbiol 2022; 79:149. [PMID: 35397072 DOI: 10.1007/s00284-022-02841-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 03/14/2022] [Indexed: 01/26/2023]
Abstract
Antimicrobial resistance of human pathogens, such as methicillin-resistant Staphylococcus aureus, is described by the World Health Organization as a health global challenge and efforts must be made for the discovery of new effective and safe compounds. This work aims to evaluate epigallocatechin-3-gallate (EGCG) epigenetic and modulatory drug potential against S. aureus in vitro and in vivo. S. aureus strains were isolated from commensal flora of healthy volunteers. Antibiotic susceptibility and synergistic assay were assessed through disk diffusion accordingly to EUCAST guidelines with and without co-exposure to EGCG at final concentrations of 250 µg/ml, 100 µg/ml, 50 µg/ml, and 25 µg/ml. Transcriptional expression of orfx, spdC, and WalKR was performed through qRT-PCR. A 90-day interventional study was performed with daily consumption of 225 mg of EGCG. Obtained data revealed a high prevalence of S. aureus colonization in healthcare workers and clearly demonstrated the antimicrobial and synergistic potential of EGCG as well as divergent resistant phenotypes associated with altered transcriptional expression of epigenetic and drug response modulators genes. Here, we demonstrate the potential of EGCG for antimicrobial treatment and/or therapeutic adjuvant against antibiotic-resistant microorganisms and report divergent patterns of epigenetic modulators expression associated with phenotypic resistance profiles.
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Affiliation(s)
- Ana Sofia Zeferino
- Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Av. D. João II, lote 4.69.01, Parque das Nações, 1990-096, Lisbon, Portugal.,Centro Hospitalar de Lisboa Central; Hospital Curry Cabral, Rua Beneficência, 8, 1050-099, Lisbon, Portugal
| | - Ana Rita Mira
- H&TRC- Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, lote 4.69.01, Parque das Nações, 1990-096, Lisbon, Portugal.,Hospital do Espírito Santo de Évora, E.P.E., Évora, Portugal
| | - Mariana Delgadinho
- H&TRC- Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, lote 4.69.01, Parque das Nações, 1990-096, Lisbon, Portugal
| | - Miguel Brito
- H&TRC- Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, lote 4.69.01, Parque das Nações, 1990-096, Lisbon, Portugal
| | - Tomás Ponte
- H&TRC- Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, lote 4.69.01, Parque das Nações, 1990-096, Lisbon, Portugal.,Escola Superior de Saúde - Universidade do Algarve, Faro, Portugal
| | - Edna Ribeiro
- H&TRC- Health & Technology Research Center, ESTeSL- Escola Superior de Tecnologia da Saúde de Lisboa, Instituto Politécnico de Lisboa, Av. D. João II, lote 4.69.01, Parque das Nações, 1990-096, Lisbon, Portugal.
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6
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Soares NL, Vieira HLA. Microglia at the Centre of Brain Research: Accomplishments and Challenges for the Future. Neurochem Res 2021; 47:218-233. [PMID: 34586585 DOI: 10.1007/s11064-021-03456-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/17/2021] [Accepted: 09/20/2021] [Indexed: 02/08/2023]
Abstract
Microglia are the immune guardians of the central nervous system (CNS), with critical functions in development, maintenance of homeostatic tissue balance, injury and repair. For a long time considered a forgotten 'third element' with basic phagocytic functions, a recent surge in interest, accompanied by technological progress, has demonstrated that these distinct myeloid cells have a wide-ranging importance for brain function. This review reports microglial origins, development, and function in the healthy brain. Moreover, it also targets microglia dysfunction and how it contributes to the progression of several neurological disorders, focusing on particular molecular mechanisms and whether these may present themselves as opportunities for novel, microglia-targeted therapeutic approaches, an ever-enticing prospect. Finally, as it has been recently celebrated 100 years of microglia research, the review highlights key landmarks from the past century and looked into the future. Many challenging problems have arisen, thus it points out some of the most pressing questions and experimental challenges for the ensuing century.
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Affiliation(s)
- Nuno L Soares
- Chronic Diseases Research Center (CEDOC) - Faculdade de Ciências Médicas/NOVA Medical School, Universidade Nova de Lisboa, Campo dos Mártires da Pátria 130, 1169-056, Lisboa, Portugal.
| | - Helena L A Vieira
- Chronic Diseases Research Center (CEDOC) - Faculdade de Ciências Médicas/NOVA Medical School, Universidade Nova de Lisboa, Campo dos Mártires da Pátria 130, 1169-056, Lisboa, Portugal.,Department of Chemistry, UCIBIO, Applied Molecular Biosciences Unit, NOVA School of Science and Technology, Universidade Nova de Lisboa, Lisboa, Portugal.,Associate Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University Lisbon, Lisboa, Portugal
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7
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Hu M, Zhang Y, Jiang X, Qiao T, Wang Q, Zhu S, Xiao M, Liu H. Double-bowl state in photonic Dirac nodal line semimetal. LIGHT, SCIENCE & APPLICATIONS 2021; 10:170. [PMID: 34417438 PMCID: PMC8379272 DOI: 10.1038/s41377-021-00614-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 08/08/2021] [Accepted: 08/09/2021] [Indexed: 06/03/2023]
Abstract
The past decade has seen a proliferation of topological materials for both insulators and semimetals in electronic systems and classical waves. Topological semimetals exhibit topologically protected band degeneracies, such as nodal points and nodal lines. Dirac nodal line semimetals (DNLS), which own four-fold line degeneracy, have drawn particular attention. DNLSs have been studied in electronic systems but there is no photonic DNLS. Here in this work, we provide a new mechanism, which is unique for photonic systems to investigate a stringent photonic DNLS. When truncated, the photonic DNLS exhibits double-bowl states (DBS), which comprise two sets of perpendicularly polarized surface states. In sharp contrast to nondegenerate surface states in other photonic systems, here the two sets of surface states are almost degenerate over the whole-spectrum range. The DBS and the bulk Dirac nodal ring (DNR) dispersion along the relevant directions, are experimentally resolved.
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Affiliation(s)
- Mengying Hu
- National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China
| | - Ye Zhang
- National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China
| | - Xi Jiang
- National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China
| | - Tong Qiao
- National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China
| | - Qiang Wang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Shining Zhu
- National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China
| | - Meng Xiao
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, 430072, Wuhan, China.
| | - Hui Liu
- National Laboratory of Solid State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 210093, Nanjing, China.
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8
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Pan Y, Fan FR, Hong X, He B, Le C, Schnelle W, He Y, Imasato K, Borrmann H, Hess C, Büchner B, Sun Y, Fu C, Snyder GJ, Felser C. Thermoelectric Properties of Novel Semimetals: A Case Study of YbMnSb 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2003168. [PMID: 33296128 DOI: 10.1002/adma.202003168] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 10/09/2020] [Indexed: 06/12/2023]
Abstract
The emerging class of topological materials provides a platform to engineer exotic electronic structures for a variety of applications. As complex band structures and Fermi surfaces can directly benefit thermoelectric performance it is important to identify the role of featured topological bands in thermoelectrics particularly when there are coexisting classic regular bands. In this work, the contribution of Dirac bands to thermoelectric performance and their ability to concurrently achieve large thermopower and low resistivity in novel semimetals is investigated. By examining the YbMnSb2 nodal line semimetal as an example, the Dirac bands appear to provide a low resistivity along the direction in which they are highly dispersive. Moreover, because of the regular-band-provided density of states, a large Seebeck coefficient over 160 µV K-1 at 300 K is achieved in both directions, which is very high for a semimetal with high carrier concentration. The combined highly dispersive Dirac and regular bands lead to ten times increase in power factor, reaching a value of 2.1 mW m-1 K-2 at 300 K. The present work highlights the potential of such novel semimetals for unusual electronic transport properties and guides strategies towards high thermoelectric performance.
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Affiliation(s)
- Yu Pan
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Feng-Ren Fan
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Xiaochen Hong
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, Dresden, 01069, Germany
| | - Bin He
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Congcong Le
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Walter Schnelle
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Yangkun He
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Kazuki Imasato
- Materials Science & Engineering (MSE), Northwestern University, Evanston, IL, 60208, USA
| | - Horst Borrmann
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Christian Hess
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, Dresden, 01069, Germany
| | - Bernd Büchner
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, Dresden, 01069, Germany
- Institute for Solid-State and Materials Physics, Technical University Dresden, Dresden, 01062, Germany
| | - Yan Sun
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Chenguang Fu
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - G Jeffrey Snyder
- Materials Science & Engineering (MSE), Northwestern University, Evanston, IL, 60208, USA
| | - Claudia Felser
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
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9
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Yang R, Corasaniti M, Le CC, Liao ZY, Wang AF, Du Q, Petrovic C, Qiu XG, Hu JP, Degiorgi L. Spin-Canting-Induced Band Reconstruction in the Dirac Material Ca_{1-x}Na_{x}MnBi_{2}. PHYSICAL REVIEW LETTERS 2020; 124:137201. [PMID: 32302196 DOI: 10.1103/physrevlett.124.137201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/12/2020] [Accepted: 03/06/2020] [Indexed: 06/11/2023]
Abstract
The ternary AMnBi_{2} (A is alkaline as well as rare-earth atom) materials provide an arena for investigating the interplay between low-dimensional magnetism of the antiferromagnetic MnBi layers and the electronic states in the intercalated Bi layers, which harbor relativistic fermions. Here, we report on a comprehensive study of the optical properties and magnetic torque response of Ca_{1-x}Na_{x}MnBi_{2}. Our findings give evidence for a spin canting occurring at T_{s}∼50-100 K. With the support of first-principles calculations we establish a direct link between the spin canting and the reconstruction of the electronic band structure, having immediate implications for the spectral weight reshuffling in the optical response, signaling a partial gapping of the Fermi surface, and the dc transport properties below T_{s}.
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Affiliation(s)
- R Yang
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - M Corasaniti
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
| | - C C Le
- Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany
| | - Z Y Liao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - A F Wang
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Q Du
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11790, USA
| | - C Petrovic
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11790, USA
| | - X G Qiu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - J P Hu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Kavli Institute for Theoretical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
- South Bay Interdisciplinary Science Center, Dongguan, Guangdong Province 523808, China
| | - L Degiorgi
- Laboratorium für Festkörperphysik, ETH-Zürich, 8093 Zürich, Switzerland
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10
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Gui X, Finkelstein GJ, Chen K, Yong T, Dera P, Cheng J, Xie W. Pressure-Induced Large Volume Collapse, Plane-to-Chain, Insulator to Metal Transition in CaMn 2Bi 2. Inorg Chem 2019; 58:8933-8937. [PMID: 31265263 DOI: 10.1021/acs.inorgchem.9b01362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In situ high pressure single crystal X-ray diffraction study reveals that the quantum material CaMn2Bi2 undergoes a unique plane to chain structural transition between 2 and 3 GPa, accompanied by a large volume collapse. Puckered Mn-Mn honeycomb layer converts to quasi-one-dimensional (1D) zigzag chains above the phase transition pressure. Single crystal measurements reveal that the pressure-induced structural transformation is accompanied by a dramatic 2 orders of magnitude drop of resistivity. Although the ambient pressure phase displays semiconducting behavior at low temperatures, metallic temperature dependent resistivity is observed for the high pressure phase, as surprisingly, are two resistivity anomalies with opposite pressure dependences, while one of them could be a magnetic transition and the other originates from Fermi surface instability. Assessment of the total energies for hypothetical magnetic structures for high pressure CaMn2Bi2 indicates that ferrimagnetism is thermodynamically favored.
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Affiliation(s)
- Xin Gui
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
| | - Gregory J Finkelstein
- Hawai'i Institute of Geophysics and Planetology , University of Hawai'i at Manoa , Honolulu , Hawaii 96822 , United States
| | - Keyu Chen
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing , China 100190.,School of Physical Sciences , University of Chinese Academy of Sciences , Beijing , China 100190
| | - Tommy Yong
- Hawai'i Institute of Geophysics and Planetology , University of Hawai'i at Manoa , Honolulu , Hawaii 96822 , United States
| | - Przemyslaw Dera
- Hawai'i Institute of Geophysics and Planetology , University of Hawai'i at Manoa , Honolulu , Hawaii 96822 , United States
| | - Jinguang Cheng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences , Beijing , China 100190.,School of Physical Sciences , University of Chinese Academy of Sciences , Beijing , China 100190.,Songshan Lake Materials Laboratory , Dongguan , Guangdong , China 523808
| | - Weiwei Xie
- Department of Chemistry , Louisiana State University , Baton Rouge , Louisiana 70803 , United States
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11
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Ovchinnikov A, Bobev S. On the effect of Ga and In substitutions in the Ca 11Bi 10 and Yb 11Bi 10 bismuthides crystallizing in the tetragonal Ho 11Ge 10 structure type. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2018; 74:269-273. [PMID: 29504553 DOI: 10.1107/s2053229618001596] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 01/26/2018] [Indexed: 11/10/2022]
Abstract
The Ga- and In-substituted bismuthides Ca11GaxBi10-x, Ca11InxBi10-x, Yb11GaxBi10-x, and Yb11InxBi10-x (x < 2) can be readily synthesized employing molten Ga or In metals as fluxes. They crystallize in the tetragonal space group I4/mmm and adopt the Ho11Ge10 structure type (Pearson code tI84; Wyckoff sequence n2 m j h2 e2 d). The structural response to the substitution of Bi with smaller and electron-poorer In or Ga has been studied by single-crystal X-ray diffraction methods for the case of Ca11InxBi10-x [x = 1.73 (2); octabismuth undecacalcium diindium]. The refinements show that the In atoms substitute Bi only at the 8h site. The refined interatomic distances show an unconventional - for this structure type - bond-length distribution within the anionic sublattice. The latter can be viewed as consisting of isolated Bi3- anions and [In4Bi820-] clusters for the idealized Ca11In2Bi8 model. Formal electron counting and first-principle calculations show that the peculiar bonding in this compound drives the system toward an electron-precise state, thereby stabilizing the observed bond-length pattern.
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Affiliation(s)
- Alexander Ovchinnikov
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Svilen Bobev
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
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12
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Mai HD, Lee I, Lee S, Yoo H. Alkali-Metal-Mediated Frameworks Based on Bis(2,6-pyridinedicarboxylate)cobalt(II) Species. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700446] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hien Duy Mai
- Department of Chemistry; Hallym University; 24252 Chuncheon Gangwon-do Republic of Korea
| | - Inme Lee
- Department of Chemistry; Hallym University; 24252 Chuncheon Gangwon-do Republic of Korea
| | - Sangdon Lee
- Department of Chemistry; Hallym University; 24252 Chuncheon Gangwon-do Republic of Korea
| | - Hyojong Yoo
- Department of Chemistry; Hallym University; 24252 Chuncheon Gangwon-do Republic of Korea
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