Novel Spin-texture on the warped Dirac-cone surface states in topological insulators

Abstract

We have investigated the nature of surface states in the Bi2Te3 family of three-dimensional topological insulators using first-principles calculations as well as model Hamiltonians. When the surface Dirac cone is warped due to Dresselhaus spin-orbit coupling in rhombohedral structures, the spin acquires a finite out-of-plane component. We predict a novel in-plane spin-texture of the warped surface Dirac cone with spins not perpendicular to the electron momentum. Our k.p model calculation reveals that this novel in-plane spin-texture requires high order Dresselhaus spin-orbit coupling terms.

4 pages, 3 figures

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• In-situ spectroscopy of intrinsic Bi2Te3 topological insulator thin films and impact of extrinsic defects
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• Hexagonal warping on spin texture, Hall conductivity and circular dichroism of Topological Insulator
• Heterostructures of graphene and topological insulators Bi${}_2$Se${}_3$, Bi${}_2$Te${}_3$, and Sb${}_2$Te${}_3$
• Gapped Surface States in a Strong-Topological-Semimetal
• Surface states scattering from a step defect in topological insulator Bi_{2}Te_{3}
• Direct Evidence for Time-Reversal Symmetry Breaking in Topological Superconductor Sr0.1Bi2Se3
• Hexagonally warped exceptional physics in multi-Weyl semimetals
• A general route to form topologically-protected surface and bulk Dirac fermions along high-symmetry lines
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• Positron surface state as a spectroscopic probe for characterizing surfaces of topological insulator materials
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• Anomalous thermoelectric properties of a Floquet topological insulator with spin momentum non-orthogonality
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• Ab initio k.p theory of spin-momentum locking: Application to topological surface states
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• Interaction Approach to Anomalous Spin Texture in Warped Topological Insulators
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• The evaluation of non-topological components in Berry phase and momentum relaxation time in a gapped 3D topological insulator
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• Topological Properties and Characterizations
• Hexagonal Warping Control of Exceptional Points in Topological Insulator--Ferromagnetic Heterojunctions
• Phase transition from Weyl to self-linked semimetal using bi-circular laser