Journal Article

PreJuSER-52975

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Role of Spin-Orbit Coupling and Hybridization Effects in the Electronic Structure of Ultrathin Bi Films

Hirahara, T. ; Nagao, T. ; Matsuda, I. ; Bihlmayer, G.FZJ* ; Chulkov, E. V. ; Koroteev, S. B. ; Echenique, P. M. ; Saito, M. ; Hasagawa, S.

2006
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1449  doi:10.1103/PhysRevLett.97.146803

Abstract: The electronic structure of Bi(001) ultrathin films (thickness >= 7 bilayers) on Si(111)-7x7 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 M ($) over bar point, which were surprisingly found to be non-spin-orbit split; the films are "electronically symmetric" despite the obvious structural nonequivalence of the top and bottom interfaces. We found that the SSs hybridize with the QWSs near M ($) over bar and lose their spin-orbit-split character.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theorie I (IFF-TH-I)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2006
Notes: This version is available at the following Publisher URL: http://prl.aps.org

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