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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 | 2013/12/26 |
| 形態種別 | 研究論文 |
| 標題 | Two types of Dirac-cone surface states on the (111) surface of the topological crystalline insulator SnTe |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review B - Condensed Matter and Materials Physics |
| 巻・号・頁 | 88(23) |
| 著者・共著者 | Y. Tanaka,T. Shoman,K. Nakayama,S. Souma,T. Sato,T. Takahashi,M. Novak,Kouji Segawa,Yoichi Ando |
| 概要 | We have performed angle-resolved photoemission spectroscopy (ARPES) on the (111) surface of the topological crystalline insulator SnTe. Distinct from a pair of Dirac-cone surface states across the X̄ point of the surface Brillouin zone on the (001) surface, we revealed two types of Dirac-cone surface states each centered at the Γ̄ and M̄ points, which originate from the bulk-band inversion at the L points. We also found that the energy location of the Dirac point and the Dirac velocity are different from each other. This ARPES experiment demonstrates the surface states on different crystal faces of a topological material, and it elucidates how mirror-symmetry-protected Dirac cones of a topological crystalline insulator show up on surfaces with different symmetries. © 2013 American Physical Society. |
| DOI | 10.1103/PhysRevB.88.235126 |
| ISSN | 1098-0121 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84892410811&origin=inward |