%0 Journal Article
%A Hirahara, T.
%A Nagao, T.
%A Matsuda, I.
%A Bihlmayer, G.
%A Chulkov, E. V.
%A Koroteev, S. B.
%A Echenique, P. M.
%A Saito, M.
%A Hasagawa, S.
%T Role of Spin-Orbit Coupling and Hybridization Effects in the Electronic Structure of Ultrathin Bi Films
%J Physical review letters
%V 97
%@ 0031-9007
%C College Park, Md.
%I APS
%M PreJuSER-52975
%P 146803
%D 2006
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000241057100060
%R 10.1103/PhysRevLett.97.146803
%U https://juser.fz-juelich.de/record/52975