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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 | 2011/10 |
| 形態種別 | 研究論文 |
| 標題 | Optimizing Bi2-xSbxTe3-ySey solid solutions to approach the intrinsic topological insulator regime |
| 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 | 84(16) |
| 著者・共著者 | Zhi Ren,A. A. Taskin,Satoshi Sasaki,Kouji Segawa,Yoichi Ando |
| 概要 | To optimize the bulk-insulating behavior in the topological insulator materials having a tetradymite structure, we have synthesized and have characterized single-crystal samples of Bi2-xSbxTe3-ySey solid solution at various compositions. We have elucidated that there are a series of intrinsic compositions where the acceptors and donors compensate each other and present a maximal bulk-insulating behavior. At such compositions, the resistivity can become as large as several Omega cm at low temperatures, and one can infer the role of the surface-transport channel in the nonlinear Hall effect. In particular, the composition of Bi1.5Sb0.5Te1.7Se1.3 achieves the lowest bulk carrier density and appears to be best suited for surface-transport studies. |
| DOI | 10.1103/PhysRevB.84.165311 |
| ISSN | 1098-0121 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80455177328&origin=inward |