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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 | 2015/04 |
| 形態種別 | 研究論文 |
| 標題 | Spin-polarized quantum well states on Bi2-xFexSe3 |
| 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 | 91(16) |
| 著者・共著者 | Michael M. Yee,Z. -H. Zhu,Anjan Soumyanarayanan,Yang He,Can-Li Song,Ekaterina Pomjakushina,Zaher Salman,Amit Kanigel,Kouji Segawa,Yoichi Ando,Jennifer E. Hoffman |
| 概要 | Low temperature scanning tunneling microscopy is used to image the doped topological insulator Bi2-xFexSe3. Interstitial Fe defects allow the detection of quasiparticle interference, and the reconstruction of the empty state band structure. Quantitative comparison between measured data and density functional theory calculations reveals the unexpected coexistence of quantum well states (QWSs) with topological surface states (TSSs) on the atomically clean surface of Bi2-xFexSe3. Spectroscopic measurements quantify the breakdown of linear dispersion due to hexagonal warping. Nonetheless, both QWSs and TSSs remain spin polarized and protected from backscattering to almost 1 eV above the Dirac point, suggesting their utility for spin-based applications. |
| DOI | 10.1103/PhysRevB.91.161306 |
| ISSN | 1098-0121/1550-235X |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84929206887&origin=inward |