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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 | 2010/12 |
| 形態種別 | 研究論文 |
| 標題 | Large bulk resistivity and surface quantum oscillations in the topological insulator Bi2Te2Se |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW B |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 82(24) |
| 著者・共著者 | Zhi Ren,A. A. Taskin,Satoshi Sasaki,Kouji Segawa,Yoichi Ando |
| 概要 | Topological insulators are predicted to present interesting surface transport phenomena but their experimental studies have been hindered by a metallic bulk conduction that overwhelms the surface transport. We show that the topological insulator Bi2Te2Se presents a high resistivity exceeding 1 Omega cm and a variable-range hopping behavior, and yet presents Shubnikov-de Haas oscillations coming from the topological surface state. Furthermore, we have been able to clarify both the bulk and surface transport channels, establishing a comprehensive understanding of the transport in this material. Our results demonstrate that Bi2Te2Se is, to our knowledge, the best material to date for studying the surface quantum transport in a topological insulator. |
| DOI | 10.1103/PhysRevB.82.241306 |
| ISSN | 1098-0121 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78651246547&origin=inward |