%0 Journal Article
%A Wada, M.
%A Murakami, S.
%A Freimuth, F.
%A Bihlmayer, G.
%T Localized edge states in two-dimensional topological insulators: Ultrathin Bi films
%J Physical review / B
%V 83
%N 12
%@ 1098-0121
%C College Park, Md.
%I APS
%M PreJuSER-14689
%P 121310
%D 2011
%Z We are grateful to S. Blugel, T. Hirahara, T. Nagao, and S. Yaginuma for helpful discussions. This research was supported in part by MEXT KAKENHI (Grants No. 21000004 and No. 22540327).
%X We theoretically study the generic behavior of the penetration depth of the edge states in two-dimensional quantum spin Hall systems. We found that the momentum-space width of the edge-state dispersion scales with the inverse of the penetration depth. As an example of well-localized edge states, we take the Bi(111) ultrathin film. Its edge states are found to extend almost over the whole Brillouin zone. Correspondingly, the bismuth (111) 1-bilayer system is proposed to have well-localized edge states in contrast to the HgTe quantum well.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000288595000004
%R 10.1103/PhysRevB.83.121310
%U https://juser.fz-juelich.de/record/14689