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タイトル: Role of spin-orbit coupling and hybridization effects in the electronic structure of ultrathin Bi films
著者: Hirahara, Toru
Nagao, Takaaki
Matsuda, Izumi
Bihlmayer, G.
Chulkov, E.V.
Koroteev, Yu.M.
Echenique, P.M.
Saito, Mineo link image link image
Hasegawa, Shuji
斎藤, 峯雄
発行日: 2006年
出版社(者): American Physical Society
雑誌名: Physical Review Letters
ISSN: 0031-9007
巻: 97
号: 14
開始ページ: 146803
抄録: The electronic structure of Bi(001) ultrathin films (thickness 7 bilayers) on Si(111)-7×7 was studied by angle-resolved photoemission spectroscopy and first-principles calculations. In contrast with the semimetallic nature of bulk Bi, both the experiment and theory demonstrate the metallic character of the films with the Fermi surface formed by spin-orbit-split surface states (SSs) showing little thickness dependence. Below the Fermi level, we clearly detected quantum well states (QWSs) at the M̄ point, which were surprisingly found to be non-spin-orbit split; the films are "electronically symmetric" despite the obvious structural nonequivalence of the top and bottom interfaces. We found that the SSs hybridize with the QWSs near M̄ and lose their spin-orbit-split character. © 2006 The American Physical Society.
DOI: 10.1103/PhysRevLett.97.146803
URI: http://hdl.handle.net/2297/14402
関連URI: http://dx.doi.org/10.1103/PhysRevLett.97.146803
資料種別: Journal Article
版表示: publisher

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/14402



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