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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 | 2016/07 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Universal scaling for the spin-electricity conversion on surface states of topological insulators |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW B |
| 掲載区分 | 国外 |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 94(2) |
| 著者・共著者 | K. T. Yamamoto,Y. Shiomi,Kouji Segawa,Yoichi Ando,E. Saitoh |
| 概要 | We have investigated spin-electricity conversion on surface states of bulk-insulating topological insulator (TI) materials using a spin-pumping technique. The sample structure is Ni-Fe|Cu|TI trilayers, in which magnetic proximity effects on the TI surfaces are negligibly small owing to the inserted Cu layer. Voltage signals produced by the spin-electricity conversion are clearly observed and are enhanced with decreasing temperature, in line with the dominant surface transport at lower temperatures. The efficiency of the spin-electricity conversion is greater for TI samples with a higher resistivity of bulk states and longer mean free path of surface states, consistent with the surface spin-electricity conversion. |
| DOI | 10.1103/PhysRevB.94.024404 |
| ISSN | 2469-9950 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84978388425&origin=inward |