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

Ming-Hao Liu, Gustav Bihlmayer, Stefan Blügel, and Ching-Ray Chang
Phys. Rev. B 76, 121301(R) – Published 5 September 2007

Abstract

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 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.

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  • Received 24 July 2007
  • Corrected 14 September 2007

DOI:https://doi.org/10.1103/PhysRevB.76.121301

©2007 American Physical Society

Corrections

14 September 2007

Erratum

Publisher's Note: Intrinsic spin-Hall accumulation in honeycomb lattices: Band structure effects [Phys. Rev. B 76, 121301 (2007)]

Ming-Hao Liu, Gustav Bihlmayer, Stefan Blügel, and Ching-Ray Chang
Phys. Rev. B 76, 129903 (2007)

Authors & Affiliations

Ming-Hao Liu1, Gustav Bihlmayer2, Stefan Blügel2, and Ching-Ray Chang1

  • 1Department of Physics, National Taiwan University, Taipei 10617, Taiwan
  • 2Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany

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Issue

Vol. 76, Iss. 12 — 15 September 2007

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