Topological surface states scattering in Antimony

Abstract

In this work we study the topologically protected states of the Sb(111) surface by using ab-initio transport theory. In the presence of a strong surface perturbation we obtain standing-wave states resulting from the superposition of spin-polarized surface states. By Fourier analysis, we identify the underlying two dimensional scattering processes and the spin texture. We find evidence of resonant transmission across surface barriers at quantum well states energies and evaluate their lifetimes. Our results are in excellent agreement with experimental findings. We also show that despite the presence of a step edge along a different high symmetry direction, not yet probed experimentally, the surface states exhibit unperturbed transmission around the Fermi energy for states with near to normal incidence.

Updated text, reference added, published version

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• Proximity band structure and spin textures on both sides of topological-insulator/ferromagnetic-metal interface and their transport probes
• Experimental Evidence of the Topological Surface States in Mg3Bi2 Films Grown by Molecular Beam Epitaxy
• Ab-initio transport across Bismuth Selenide surface barriers
• Spin-orbit induced equilibrium spin currents in materials
• Single atom anisotropic magnetoresistance on a topological insulator surface