Elastic scattering of surface states on three-dimensional topological insulators

doi:10.1088/1674-1056/22/6/067301

Abstract Topological insulators as a new type of quantum matter materials are characterized by a full insulating gap in the bulk and gapless edge/surface states protected by the time-reversal symmetry. We propose that the interference patterns caused by the elastic scattering of defects or impurities are dominated by the surface states at the extremal points on the constant energy contour. Within such a formalism, we summarize our recent theoretical investigations on the elastic scattering of topological surface states by various imperfections, including non-magnetic impurities, magnetic impurities, step edges, and various other defects, in comparison with the recent related experiments in typical topological materials such as BiSb alloys, Bi₂Te₃, and Bi₂Se₃ crystals.

Keywords: topological insulator surface state scattering by imperfection scanning tunneling microscope

Received: 13 May 2013
Accepted manuscript online:

PACS:	73.20.-r	(Electron states at surfaces and interfaces)
	68.37.Ef	(Scanning tunneling microscopy (including chemistry induced with STM))
	73.43.Cd	(Theory and modeling)
	72.10.Fk	(Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))

Fund: Project supported by the Basic Research Program of China (Grant No. 2011CB921901) and the National Natural Science Foundation of China (Grant No. 11074143).

Corresponding Authors: Zhu Bang-Fen
E-mail: bfz@mail.tsinghua.edu.cn

Cite this article:

Wang Jing (王靖), Zhu Bang-Fen (朱邦芬) Elastic scattering of surface states on three-dimensional topological insulators 2013 Chin. Phys. B 22 067301

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Elastic scattering of surface states on three-dimensional topological insulators

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