Elastic scattering of surface states on three-dimensional topological insulators  

作　　者：王靖 朱邦芬 

机构地区：[1]State Key Laboratory of Low-Dimensional Quantum Physics,and Department of Physics,Tsinghua University [2]Department of Physics,McCullough Building,Stanford University [3]Institute of Advanced Study,Tsinghua University

出　　处：《Chinese Physics B》2013年第6期49-57,共9页中国物理B（英文版）

基　　金：supported by the Basic Research Program of China (Grant No. 2011CB921901);the National Natural Science Foundation of China (Grant No. 11074143)

摘　　要：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.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.

关 键 词：topological insulator surface state scattering by imperfection scanning tunneling microscope 

分 类 号：O413[理学—理论物理]