Anisotropy effects on Rashba and topological insulator spin polarized surface states: a unified phenomenological description

Abstract

Spin polarized two-dimensional electronic states have been previously observed on metallic surface alloys with giant Rashba splitting and on the surface of topological insulators. We study the surface band structure of these systems, in a unified manner, by exploiting recent results of k.p theory. The model suggests a different way to address the effect of anisotropy in Rashba systems. Changes in the surface band structure of various Rashba compounds can be captured by a single effective parameter which quantifies the competition between the Rashba effect and the hexagonal warping of the constant energy contours. The same model provides a unified phenomenological description of the surface states belonging to materials with topologically trivial and non-trivial band structures.

8 pages, 4 figures, 1 table

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Cited by in corpus (13)

• Emergent quantum confinement at topological insulator surfaces
• Giant ambipolar Rashba effect in a semiconductor: BiTeI
• Higher-order contributions to the Rashba-Bychkov effect with application to Bi/Ag(111) surface alloy
• Origin of the Magnetic Spin Hall Effect: Spin Current Vorticity in the Fermi Sea
• Observation of a topologically non-trivial surface state in half-Heusler PtLuSb (001) thin films
• Three-Dimensional Spin Rotations at the Fermi Surface of a Strongly Spin-Orbit Coupled Surface System
• Anisotropic effect of warping on the lifetime broadening of topological surface states in angle-resolved photoemission from Bi${}_2$Te${}_3$
• Observation of surface states on heavily indium doped SnTe(111), a superconducting topological crystalline insulator
• Structure and electronic properties of the ($\sqrt{3}\times \sqrt{3}$)$R30^{\circ }$ SnAu${}_2$/Au(111) surface alloy
• Strongly anisotropic spin-orbit splitting in a two-dimensional electron gas
• A general route to form topologically-protected surface and bulk Dirac fermions along high-symmetry lines
• Anisotropic spin gaps in BiAg${}_2$-Ag/Si(111)
• The anomalous spin texture as the probe for interactions in $B{i}_{2-y}S{b}_{y}S{e}_{x}T{e}_{3-x}$