TY  - JOUR
AU  - Wada, M.
AU  - Murakami, S.
AU  - Freimuth, F.
AU  - Bihlmayer, G.
TI  - Localized edge states in two-dimensional topological insulators: Ultrathin Bi films
JO  - Physical review / B
VL  - 83
IS  - 12
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-14689
SP  - 121310
PY  - 2011
N1  - 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).
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000288595000004
DO  - DOI:10.1103/PhysRevB.83.121310
UR  - https://juser.fz-juelich.de/record/14689
ER  -