Impurity-induced states on the surface of three-dimensional topological insulators

被引：209

作者：

Biswas, Rudro R. ^{[1
,2
]}

Balatsky, A. V. ^{[2
,3
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

[3] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 23期

关键词：

SINGLE DIRAC CONE; SUPERCONDUCTORS; MODELS;

D O I：

10.1103/PhysRevB.81.233405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the modification of the local electronic structure caused by a single local impurity on the surface of a three-dimensional topological insulator. We find that the local density of states around the Dirac point of the electronic spectrum at the surface is significantly disrupted near the impurity by the creation of low-energy resonance state(s)-however, this is not sufficient to (locally) destroy the Dirac point. We also calculate the nontrivial spin textures created near the magnetic impurities and discover anisotropic Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between them.

引用

页数：4

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