TY  - JOUR
AU  - Liu, M.-H.
AU  - Bihlmayer, G.
AU  - Blügel, S.
AU  - Chang, Ch.-R.
TI  - Intrinsic spin-Hall accumulation in honeycomb lattices: Band structure effects
JO  - Physical review / B
VL  - 76
IS  - 12
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-58086
SP  - 121301
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - Local spin and charge densities on a two-dimensional honeycomb lattice are calculated by the Landauer-Keldysh formalism (LKF). Through the empirical tight-binding method, we show how the realistic band structure can be brought into the LKF. Taking the Bi(111) surface, on which strong surface states and Rashba spin-orbit coupling are present [Phys. Rev. Lett. 93, 046403 (2004)], as a numeric example, we show typical intrinsic spin-Hall accumulation (ISHA) patterns thereon. The Fermi-energy-dependence of the spin and charge transport in two-terminal nanostructure samples is subsequently analyzed. By changing E-F, we show that the ISHA pattern is nearly isotropic (free-electron-like) only when E-F is close to the band bottom, and is sensitive/insensitive to E-F for the low/high bias regime with such E-F. With E-F far from the band bottom, band structure effects thus enter the ISHA patterns and the transport direction becomes significant.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000249786500002
DO  - DOI:10.1103/PhysRevB.76.121301
UR  - https://juser.fz-juelich.de/record/58086
ER  -