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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 | 2016/08 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Work function of bulk-insulating topological insulator Bi2-xSbxTe3-ySey |
| 執筆形態 | その他 |
| 掲載誌名 | APPLIED PHYSICS LETTERS |
| 掲載区分 | 国外 |
| 出版社・発行元 | AMER INST PHYSICS |
| 巻・号・頁 | 109(9) |
| 著者・共著者 | Daichi Takane,Seigo Souma,Takafumi Sato,Takashi Takahashi,Kouji Segawa,Yoichi Ando |
| 概要 | Recent discovery of bulk insulating topological insulator (TI) Bi2-xSbxTe3-ySey paved a pathway toward practical device application of TIs. For realizing TI-based devices, it is necessary to contact TIs with a metal. Since the band-bending at the interface dominates the character of devices, knowledge of TIs' work function is of essential importance. We have determined the compositional dependence of the work function in Bi2-xSbxTe3-ySey by high-resolution photoemission spectroscopy. The obtained work-function values (4.95-5.20 eV) track the energy shift of the surface chemical potential seen by angle-resolved photoemission spectroscopy. The present result serves as a useful guide for developing TI-based electronic devices. Published by AIP Publishing. |
| DOI | 10.1063/1.4961987 |
| ISSN | 0003-6951 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84984863560&origin=inward |