%0 Journal Article
%A Liu, M.-H.
%A Bihlmayer, G.
%A Blügel, S.
%A Chang, Ch.-R.
%T Intrinsic spin-Hall accumulation in honeycomb lattices: Band structure effects
%J Physical review / B
%V 76
%N 12
%@ 1098-0121
%C College Park, Md.
%I APS
%M PreJuSER-58086
%P 121301
%D 2007
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000249786500002
%R 10.1103/PhysRevB.76.121301
%U https://juser.fz-juelich.de/record/58086