Intrinsic spin-Hall accumulation in honeycomb lattices: Band structure effects

Ming Hao Liu, Gustav Bihlmayer, Stefan Blügel, Ching Ray Chang

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)


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, 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 EF, we show that the ISHA pattern is nearly isotropic (free-electron-like) only when EF is close to the band bottom, and is sensitive/insensitive to EF for the low/high bias regime with such EF. With EF far from the band bottom, band structure effects thus enter the ISHA patterns and the transport direction becomes significant.

期刊Physical Review B - Condensed Matter and Materials Physics
出版狀態Published - 2007 9月 14

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學


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