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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