101
|
Faisal H, Hirano S, Irisuna F, Kimura S, Morihara N, Fukazawa T, Arfan A, Horimasu Y, Hattori N, Kohno N, Hiyama E. P3.02-009 Mutation Detection in Cell-Free DNA from Patients with Lung Adenocarcinoma by Next-Generation Sequencing. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
102
|
Komiya K, Nakamura T, Hayase M, Hirakawa H, Ogusu S, Abe T, Nakashima C, Takahashi K, Takeda Y, Kimura S, Sueoka-Aragane N. P2.03-011 Correlation and Problems of Re-Biopsy and Liquid Biopsy for Detecting T790M Mutation. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
103
|
Abe T, Nakashima C, Sato A, Sueoka E, Kimura S, Sueoka-Aragane N. P1.01-028 Characteristics of Cell Free DNA in Lung Cancer Patients. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
104
|
Ito M, Miyata Y, Hirano S, Kimura S, Irisuna F, Kushitani K, Tsutani Y, Takeshima Y, Okada M. P2.15-011 Therapeutic Strategies and Genetic Comparisons in SCLC and LCNEC of the Lung Using Next-Generation Sequencing. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
105
|
Miyake N, Ozasa S, Mabe H, Kimura S, Shiina M, Imagawa E, Miyatake S, Nakashima M, Mizuguchi T, Takata A, Ogata K, Matsumoto N. A novel missense mutation affecting the same amino acid as the recurrent PACS1 mutation in Schuurs-Hoeijmakers syndrome. Clin Genet 2017; 93:929-930. [PMID: 28975623 DOI: 10.1111/cge.13105] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/18/2017] [Accepted: 07/19/2017] [Indexed: 02/03/2023]
Abstract
A novel causative variant (c.608G>A, p.Arg203Gln) in PACS1.
Collapse
|
106
|
Ogata T, Tsuboi Y, Kimura S. Successful early swallowing rehabilitation in a patients with Wallenberg syndrome. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
107
|
Kimura S, Nakanishi H, Noda S, Murakami A, Iijima M, Koike H, Katsuno M. Diagnostic value of muscle biopsy for neuromuscular diseases. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
108
|
Kimura S, Nakamura S, Nakagama S, Hayasaka K, Misawa T, Mizusawa M, Yamakami Y, Kojima K, Sagawa Y, Ohtani H, Hishikari K, Sugiyama T, Hikita H, Takahashi A. P2367The impact of systemic pentraxin-3 values on coronary plaque components by optical coherence tomography and outcomes in patients with stable angina pectoris. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
109
|
Momota K, Furukawa H, Kimura S, Hotoda H, Oka S, Shimada K. Antiviral and Biological Properties of Dimethoxytrityl-Linked Guanine-Rich Oligodeoxynucleotides that Inhibit Replication by Primary Clinical Human Immunodeficiency virus Type 1 Isolates. ACTA ACUST UNITED AC 2017. [DOI: 10.1177/095632029700800603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
110
|
Sadamasu A, Yamaguchi S, Nakagawa R, Kimura S, Endo J, Akagi R, Sasho T. The recognition and incidence of peroneal tendon dislocation associated with a fracture of the talus. Bone Joint J 2017; 99-B:489-493. [PMID: 28385938 DOI: 10.1302/0301-620x.99b4.bjj-2016-0641.r1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 11/14/2016] [Indexed: 11/05/2022]
Abstract
AIMS The purposes of this study were to clarify first, the incidence of peroneal tendon dislocation in patients with a fracture of the talus and second the factors associated with peroneal tendon dislocation. PATIENTS AND METHODS We retrospectively examined 30 patients (30 ankles) with a mean age of 37.5 years, who had undergone internal fixation for a fracture of the talus. Independent examiners assessed for peroneal tendon dislocation using the pre-operative CT images. The medical records were also reviewed for the presence of peroneal tendon dislocation. The associations between the presence of dislocation with the patient characteristics or radiological findings, including age, mechanism of injury, severity of fracture, and fleck sign, were assessed using Fisher's exact tests. RESULTS The pre-operative CT images showed peroneal tendon dislocation in eight out of 30 patients. Dislocation was found later in one patient whose pre-operative CT image had not shown dislocation. The overall incidence of peroneal tendon dislocation was 30% (9/30). The presence of dislocation was associated with the presence of a fleck sign (p = 0.03). CONCLUSIONS Surprisingly, approximately one-third of the patients who underwent internal fixation for a fracture of the talus had peroneal tendon dislocation. This was associated with a fleck sign. Cite this article: Bone Joint J 2017;99-B:489-93.
Collapse
|
111
|
Kimura S, Saito M, Kida Y, Seki A, Isaka Y, Marumo K. Effects of raloxifene and alendronate on non-enzymatic collagen cross-links and bone strength in ovariectomized rabbits in sequential treatments after daily human parathyroid hormone (1-34) administration. Osteoporos Int 2017; 28:1109-1119. [PMID: 27796444 DOI: 10.1007/s00198-016-3812-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 10/17/2016] [Indexed: 01/22/2023]
Abstract
UNLABELLED This study investigated the effects of raloxifene and alendronate to follow parathyroid hormone (PTH) on bone collagen and biomechanical properties in ovariectomized rabbits. Sequential treatments of raloxifene and alendronate after hPTH(1-34) treatment improved biomechanical properties with and without bone collagen improvement, respectively. INTRODUCTION The standard sequential treatment to follow human parathyroid hormone (hPTH) (1-34) therapy for osteoporosis has yet to be determined. The objective of this study was to compare the effects of raloxifene and alendronate treatments to follow daily hPTH(1-34) treatment on non-enzymatic collagen cross-links, bone mass, and bone strength in ovariectomized (OVX) rabbits. METHODS From 3 months after ovariectomy, seven month-old female New Zealand white rabbits were given either vehicle or hPTH(1-34) (8 μg/kg/day), once daily for 5 months. After hPTH(1-34) treatment, the hPTH(1-34)-treated animals were divided into two groups, and given raloxifene (10 mg/kg, daily) orally or alendronate (100 μg/kg, twice weekly) subcutaneously for 5 months. We evaluated bone mineral density (BMD), bone structural parameters, advanced glycation end product (AGE) content in collagen, and bone mechanical parameters including intrinsic parameters in the femur. RESULTS Raloxifene (hPTH/RLX) and alendronate (hPTH/ALN) to follow hPTH(1-34) increased cortical thickness, maximum load, and maximum stress and decreased endocortical surface in the diaphysis, in addition to increasing total BMD in the distal metaphysis. Decreased trabecular AGE, pentosidine, and homocysteine contents and increased toughness and breaking energy were noted with hPTH/RLX treatment only. With hPTH/ALN treatment, no effects on non-enzymatic collagen cross-link AGEs were noted although increases in stiffness and elastic modulus were observed. CONCLUSION These results suggest that sequential treatments with hPTH(1-34) and antiresorptive drugs (raloxifene and alendronate) have a beneficial effect on bone mass and biomechanical properties in OVX rabbits.
Collapse
|
112
|
Nishida Y, Maeda A, Kim MJ, Cao L, Kubota Y, Ishizawa J, AlRawi A, Kato Y, Iwama A, Fujisawa M, Matsue K, Weetall M, Dumble M, Andreeff M, Davis TW, Branstrom A, Kimura S, Kojima K. The novel BMI-1 inhibitor PTC596 downregulates MCL-1 and induces p53-independent mitochondrial apoptosis in acute myeloid leukemia progenitor cells. Blood Cancer J 2017; 7:e527. [PMID: 28211885 PMCID: PMC5386342 DOI: 10.1038/bcj.2017.8] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Accepted: 12/20/2016] [Indexed: 12/24/2022] Open
Abstract
Disease recurrence is the major problem in the treatment of acute myeloid leukemia (AML). Relapse is driven by leukemia stem cells, a chemoresistant subpopulation capable of re-establishing disease. Patients with p53 mutant AML are at an extremely high risk of relapse. B-cell-specific Moloney murine leukemia virus integration site 1 (BMI-1) is required for the self-renewal and maintenance of AML stem cells. Here we studied the effects of a novel small molecule inhibitor of BMI-1, PTC596, in AML cells. Treatment with PTC596 reduced MCL-1 expression and triggered several molecular events consistent with induction of mitochondrial apoptosis: loss of mitochondrial membrane potential, BAX conformational change, caspase-3 cleavage and phosphatidylserine externalization. PTC596 induced apoptosis in a p53-independent manner. PTC596 induced apoptosis along with the reduction of MCL-1 and phosphorylated AKT in patient-derived CD34+CD38low/− stem/progenitor cells. Mouse xenograft models demonstrated in vivo anti-leukemia activity of PTC596, which inhibited leukemia cell growth in vivo while sparing normal hematopoietic cells. Our results indicate that PTC596 deserves further evaluation in clinical trials for refractory or relapsed AML patients, especially for those with unfavorable complex karyotype or therapy-related AML that are frequently associated with p53 mutations.
Collapse
|
113
|
Shikata F, Kimura S, Hattori Y, Otsuka M. Real-time monitoring of granule properties during high shear wet granulation by near-infrared spectroscopy with a chemometrics approach. RSC Adv 2017. [DOI: 10.1039/c7ra05252a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An in-line near-infrared spectroscopy monitoring method was developed for analyzing granule properties during a high shear wet granulation process.
Collapse
|
114
|
Commara ML, Mazzocco M, Boiano A, Boiano C, Manea C, Parascandolo C, Pierroutsakou D, Signorini C, Strano E, Torresi D, Yamaguchi H, Kahl D, Meo PD, Grebosz J, Imai N, Hirayama Y, Ishiyama H, Iwasa N, Jeong S, Jia H, Kim Y, Kimura S, Kubono S, Lin C, Miyatake H, Mukai M, Nakao T, Nicoletto M, Sakaguchi Y, Sánchez-Benítez A, Soramel F, Teranishi T, Wakabayashi Y, Watanabe Y, Yang L, Yang Y. 8B + 208Pb Elastic Scattering at Coulomb Barrier Energies. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201716300032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
115
|
Kashiwada T, Harada Y, Yoda Y, Noshiro H, Aragane N, Kimura S. 236P Comparing chemo-radiotherapy with 5-fluorouracil and cisplatin versus thoracoscopic esophagectomy for cStage II- III esophageal squamous cell carcinoma. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00393-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
116
|
Kashiwada T, Harada Y, Yoda Y, Noshiro H, Aragane N, Kimura S. 236P Comparing chemo-radiotherapy with 5-fluorouracil and cisplatin versus thoracoscopic esophagectomy for cStage II-III esophageal squamous cell carcinoma. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw582.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
117
|
Yamaguchi Y, Torisu H, Kira R, Ishizaki Y, Sakai Y, Sanefuji M, Ichiyama T, Oka A, Kishi T, Kimura S, Kubota M, Takanashi J, Takahashi Y, Tamai H, Natsume J, Hamano S, Hirabayashi S, Maegaki Y, Mizuguchi M, Minagawa K, Yoshikawa H, Kira J, Kusunoki S, Hara T. A nationwide survey of pediatric acquired demyelinating syndromes in Japan. Neurology 2016; 87:2006-2015. [PMID: 27742816 PMCID: PMC5109945 DOI: 10.1212/wnl.0000000000003318] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 07/28/2016] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To investigate the clinical and epidemiologic features of pediatric acquired demyelinating syndromes (ADS) of the CNS in Japan. METHODS We conducted a nationwide survey and collected clinical data on children with ADS aged 15 years or younger, who visited hospitals between 2005 and 2007. RESULTS Among 977 hospitals enrolled, 723 (74.0%) responded to our inquiries and reported a total of 439 patients as follows: 244 with acute disseminated encephalomyelitis (ADEM), 117 with multiple sclerosis (MS), 14 with neuromyelitis optica (NMO), and 64 with other ADS. We collected and analyzed detailed data from 204 cases, including those with ADEM (66), MS (58), and NMO (10). We observed the following: (1) the estimated annual incidence rate of pediatric ADEM in Japan was 0.40 per 100,000 children (95% confidence interval [CI], 0.34-0.46), with the lowest prevalence in the north; (2) the estimated prevalence rate of MS was 0.69 per 100,000 children (95% CI, 0.58-0.80), with the lowest prevalence in the south; (3) NMO in Japan was rare, with an estimated prevalence of 0.06 per 100,000 children (95% CI, 0.04-0.08); and (4) the sex ratio and mean age at onset varied by ADS type, and (5) male/female ratios correlated with ages at onset in each ADS group. CONCLUSIONS Our results clarify the characteristic clinical features of pediatric ADS in the Japanese population.
Collapse
|
118
|
Zhu W, Mitsuhashi S, Yonekawa T, Noguchi S, Chai Yui Huei J, Nalini A, Preethish-Kumar V, Yamamoto M, Murakata K, Mori-Yoshimura M, Kamada S, Yahikozawa H, Karasawa M, Kimura S, Yamashita F, Nishino I. Alu-mediated copy number variants in GNE myopathy. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
119
|
Suzuki T, Miyake N, Tsurusaki Y, Okamoto N, Alkindy A, Inaba A, Sato M, Ito S, Muramatsu K, Kimura S, Ieda D, Saitoh S, Hiyane M, Suzumura H, Yagyu K, Shiraishi H, Nakajima M, Fueki N, Habata Y, Ueda Y, Komatsu Y, Yan K, Shimoda K, Shitara Y, Mizuno S, Ichinomiya K, Sameshima K, Tsuyusaki Y, Kurosawa K, Sakai Y, Haginoya K, Kobayashi Y, Yoshizawa C, Hisano M, Nakashima M, Saitsu H, Takeda S, Matsumoto N. Molecular genetic analysis of 30 families with Joubert syndrome. Clin Genet 2016; 90:526-535. [PMID: 27434533 DOI: 10.1111/cge.12836] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/27/2016] [Accepted: 07/14/2016] [Indexed: 02/02/2023]
Abstract
Joubert syndrome (JS) is rare recessive disorders characterized by the combination of hypoplasia/aplasia of the cerebellar vermis, thickened and elongated superior cerebellar peduncles, and a deep interpeduncular fossa which is defined by neuroimaging and is termed the 'molar tooth sign'. JS is genetically highly heterogeneous, with at least 29 disease genes being involved. To further understand the genetic causes of JS, we performed whole-exome sequencing in 24 newly recruited JS families. Together with six previously reported families, we identified causative mutations in 25 out of 30 (24 + 6) families (83.3%). We identified eight mutated genes in 27 (21 + 6) Japanese families, TMEM67 (7/27, 25.9%) and CEP290 (6/27, 22.2%) were the most commonly mutated. Interestingly, 9 of 12 CEP290 disease alleles were c.6012-12T>A (75.0%), an allele that has not been reported in non-Japanese populations. Therefore c.6012-12T>A is a common allele in the Japanese population. Importantly, one Japanese and one Omani families carried compound biallelic mutations in two distinct genes (TMEM67/RPGRIP1L and TMEM138/BBS1, respectively). BBS1 is the causative gene in Bardet-Biedl syndrome. These concomitant mutations led to severe and/or complex clinical features in the patients, suggesting combined effects of different mutant genes.
Collapse
|
120
|
Kimura S, Kakihata K, Sawada Y, Watanabe K, Matsumoto M, Hagiwara M, Tanaka H. Ferroelectricity by Bose-Einstein condensation in a quantum magnet. Nat Commun 2016; 7:12822. [PMID: 27666875 PMCID: PMC5052672 DOI: 10.1038/ncomms12822] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 08/04/2016] [Indexed: 11/09/2022] Open
Abstract
The Bose–Einstein condensation is a fascinating phenomenon, which results from quantum statistics for identical particles with an integer spin. Surprising properties, such as superfluidity, vortex quantization or Josephson effect, appear owing to the macroscopic quantum coherence, which spontaneously develops in Bose–Einstein condensates. Realization of Bose–Einstein condensation is not restricted in fluids like liquid helium, a superconducting phase of paired electrons in a metal and laser-cooled dilute alkali atoms. Bosonic quasi-particles like exciton-polariton and magnon in solids-state systems can also undergo Bose–Einstein condensation in certain conditions. Here, we report that the quantum coherence in Bose–Einstein condensate of the magnon quasi particles yields spontaneous electric polarization in the quantum magnet TlCuCl3, leading to remarkable magnetoelectric effect. Very soft ferroelectricity is realized as a consequence of the O(2) symmetry breaking by magnon Bose–Einstein condensation. The finding of this ferroelectricity will open a new window to explore multi-functionality of quantum magnets. Magnons, quantized spin excitations in magnetic materials, may undergo Bose-Einstein condensation into a macroscopic correlated quantum state at low temperature. Here, the authors demonstrate how magnon condensation in quantum magnet TlCuCl3 generates an electrical polarization.
Collapse
|
121
|
Kimura S, Yamada S, Noguchi H, Wang K, Nakayama T. CCL22/ macrophage-derived chemokine expression via histamine in the atherosclerosis. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
122
|
Okazaki M, Higashihara H, Ono H, Koganemaru F, Fujimitsu R, Mizuma Y, Nakamura T, Sato S, Kimura S, Kodama S. Chemoembolization for Hepatocellular Carcinoma via the Inferior Pancreaticoduodenal Artery in Patients with Celiac Artery Stenosis. Acta Radiol 2016. [DOI: 10.1177/028418519303400105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Twenty-one patients with hepatocellular carcinoma (HCC) accompanied by extensive celiac artery stenosis or obstruction were treated by chemoembolization via the inferior pancreaticoduodenal artery (IPDA). The tip of the catheter was placed in the arteries in front of the confluence with the proper hepatic artery in 12 patients (group A: the proximal portion of the IPDA in 10, and common hepatic artery in 2), and in the proper hepatic artery or branches of it (group B) in 9 using a coaxial catheter system. Transient hyperamylasemia was observed in 10 of the 12 patients in group A and in 3 of the 9 patients in group B after chemoembolization. Splenic infarction developed in 8 patients in group A and in none in group B. Intrapancreatic fluid collection was present in 2 patients in group A following chemoembolization. No fatal complications were encountered. The 1-, 2-, and 3-year survival rates of the 10 patients in group A treated by only chemoembolization were 90, 57, and 23%, respectively (mean survival 780 days). The 1- and 2-year survival rates of 9 patients in group B were 85.8 and 85.8% (mean 879 days), respectively. Considering the severity of complications and the survival rates in groups A and B, chemoembolization by superselective catheterization into the hepatic artery via the IPDA is the treatment of choice. However, chemoembolization from the arteries in front of the confluence with the proper hepatic artery seems to be acceptable in cases of hypervascular HCC which fail to be superselectively catheterized.
Collapse
|
123
|
Nakayama M, Kondo T, Tian Z, Ishikawa JJ, Halim M, Bareille C, Malaeb W, Kuroda K, Tomita T, Ideta S, Tanaka K, Matsunami M, Kimura S, Inami N, Ono K, Kumigashira H, Balents L, Nakatsuji S, Shin S. Slater to Mott Crossover in the Metal to Insulator Transition of Nd_{2}Ir_{2}O_{7}. PHYSICAL REVIEW LETTERS 2016; 117:056403. [PMID: 27517783 DOI: 10.1103/physrevlett.117.056403] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Indexed: 06/06/2023]
Abstract
We present an angle-resolved photoemission study of the electronic structure of the three-dimensional pyrochlore iridate Nd_{2}Ir_{2}O_{7} through its magnetic metal-insulator transition. Our data reveal that metallic Nd_{2}Ir_{2}O_{7} has a quadratic band, touching the Fermi level at the Γ point, similar to that of Pr_{2}Ir_{2}O_{7}. The Fermi node state is, therefore, a common feature of the metallic phase of the pyrochlore iridates. Upon cooling below the transition temperature, this compound exhibits a gap opening with an energy shift of quasiparticle peaks like a band gap insulator. The quasiparticle peaks are strongly suppressed, however, with further decrease of temperature, and eventually vanish at the lowest temperature, leaving a nondispersive flat band lacking long-lived electrons. We thereby identify a remarkable crossover from Slater to Mott insulators with decreasing temperature. These observations explain the puzzling absence of Weyl points in this material, despite its proximity to the zero temperature metal-insulator transition.
Collapse
|
124
|
Mazzocco M, Boiano A, Boiano C, La Commara M, Manea C, Parascandolo C, Pierroutsakou D, Signorini C, Strano E, Torresi D, Yamaguchi H, Kahl D, Acosta L, Di Meo P, Fernandez-Garcia J, Glodariu T, Grebosz J, Guglielmetti A, Imai N, Hirayama Y, Ishiyama H, Iwasa N, Jeong S, Jia H, Keeley N, Kim Y, Kimura S, Kubono S, Lay J, Lin C, Marquinez-Duran G, Martel I, Miyatake H, Mukai M, Nakao T, Nicoletto M, Pakou A, Rusek K, Sakaguchi Y, Sánchez-Benítez A, Sava T, Sgouros O, Stefanini C, Soramel F, Soukeras V, Stiliaris E, Stroe L, Teranishi T, Toniolo N, Wakabayashi Y, Watanabe Y, Yang L, Yang Y. 7Be- and8B-reaction dynamics at Coulomb barrier energies. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201611706006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
125
|
Hirayama Y, Miyatake H, Watanabe Y, Imai N, Ishiyama H, Jeong S, Jung H, Oyaizu M, Mukai M, Kimura S, Sonoda T, Wada M, Kim Y, Huyse M, Kudryavtsev Y, Van Duppen P. Beta-decay spectroscopy of r-process nuclei around N= 126. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201610908001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|