Theory of anisotropic Rashba splitting of surface states

Abstract

We investigate the surface Rashba effect for a surface of reduced in-plane symmetry. Formulating a k.p perturbation theory, we show that the Rashba splitting is anisotropic, in agreement with symmetry-based considerations. We show that the anisotropic Rashba splitting is due to the admixture of bulk states of different symmetry to the surface state, and it cannot be explained within the standard theoretical picture supposing just a normal-to-surface variation of the crystal potential. Performing relativistic ab initio calculations we find a remarkably large Rashba anisotropy for an unreconstructed Au(110) surface that is in the experimentally accessible range.

4 pages, 5 figures

References in corpus (6)

• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Giant Spin-splitting in the Bi/Ag(111) Surface Alloy
• Strong spin-orbit splitting on Bi surfaces
• Rashba type spin-orbit splitting of quantum well states in ultrathin Pb films
• Anomalous Hall effect in a two-dimensional electron gas with spin-orbit interaction
• Anomalous Hall effect in a two dimensional electron gas with magnetic impurities

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• The competition between the intrinsic and Rashba spin-orbit coupling and effects of correlations on Rashba SOC-driven transitions in the Kane-Mele model
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