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セガワ コウジ
SEGAWA KOJI
瀬川 耕司 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2013/05/17 |
| 形態種別 | 研究論文 |
| 標題 | Fermiology of the strongly spin-orbit coupled superconductor Sn 1-xInxTe: Implications for topological superconductivity |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review Letters |
| 巻・号・頁 | 110(20) |
| 著者・共著者 | T. Sato,Y. Tanaka,K. Nakayama,S. Souma,T. Takahashi,S. Sasaki,Z. Ren,A. A. Taskin,Kouji Segawa,Yoichi Ando |
| 概要 | We have performed angle-resolved photoemission spectroscopy on the strongly spin-orbit coupled low-carrier density superconductor Sn1-xIn xTe (x=0.045) to elucidate the electronic states relevant to the possible occurrence of topological superconductivity, as recently reported for this compound based on point-contact spectroscopy. The obtained energy-band structure reveals a small holelike Fermi surface centered at the L point of the bulk Brillouin zone, together with a signature of a topological surface state, indicating that this material is a doped topological crystalline insulator characterized by band inversion and mirror symmetry. A comparison of the electronic states with a band-noninverted superconductor possessing a similar Fermi surface structure, Pb1-xTlxTe, suggests that the anomalous behavior in the superconducting state of Sn1-xIn xTe is related to the peculiar orbital characteristics of the bulk valence band and/or the presence of a topological surface state. © 2013 American Physical Society. |
| DOI | 10.1103/PhysRevLett.110.206804 |
| ISSN | 0031-9007 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84877904381&origin=inward |