Engineered near-perfect backscattering on the surface of a topological insulator with nonmagnetic impurities

被引：17
作者：
Fransson, J. [1 ]
Black-Schaffer, A. M. [1 ]
Balatsky, A. V. [2 ,3 ]
机构：
[1] Uppsala Univ, Dept Phys & Astron, SE-75121 Uppsala, Sweden
[2] NORDITA, SE-10691 Stockholm, Sweden
[3] Inst Mat Sci Agh, Los Alamos, NM 87545 USA
来源：
PHYSICAL REVIEW B | 2014年 / 90卷 / 24期
基金：
瑞典研究理事会; 欧洲研究理事会;
关键词：
SPIN TEXTURE; BERRYS PHASE; BI2SE3;
D O I：
10.1103/PhysRevB.90.241409
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We show how to engineer enhanced skew scattering and gaplike openings in the surface state of three-dimensional topological insulators using only nonmagnetic impurities. Enhanced skewscattering off nonmagnetic impurities is obtained as a finite size effect of the scattering potential. Intimately related to the generated skew scattering is the emergence of a gaplike density of electron states locally around the impurities and surrounded by sharp resonances, with an extended energy gap appearing in engineered impurity structures.
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页数：5
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