Resonant spin dipole induced by an in-plane potential gradient spin-orbit interaction

K. Y. Chen, C. S. Chu, and A. G. Mal’shukov
Phys. Rev. B 76, 153304 – Published 11 October 2007

Abstract

Spin-orbit interaction (SOI) arising from in-plane potential gradient is invoked for the generation of spin accumulation in a driven electric field. The SOI and a local in-plane potential pattern together bring about resonant spin dependent scatterings to electrons in a nonequilibrium distribution. In the vicinity of a ring-shaped potential barrier pattern, a spin dipole distribution with a resonant dipole strength characteristic is obtained. As the chemical potential μ is increased across one such resonant energy, the dipole strength manifests both sign reversal and large amplitude enhancement. The scattering resonance, thus, provides an additional knob for the manipulation of the spin accumulation.

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  • Received 30 May 2007

DOI:https://doi.org/10.1103/PhysRevB.76.153304

©2007 American Physical Society

Authors & Affiliations

K. Y. Chen1, C. S. Chu1, and A. G. Mal’shukov1,2,3

  • 1Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
  • 2Institute of Spectroscopy, Russian Academy of Science, 142190 Troitsk, Moscow oblast, Russia
  • 3National Center for Theoretical Sciences, Hsinchu 30043, Taiwan

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Issue

Vol. 76, Iss. 15 — 15 October 2007

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