Wormhole effect in a strong topological insulator

被引：89

作者：

Rosenberg, G. ^{[1
]}

Guo, H. -M. ^{[1
]}

Franz, M. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SINGLE DIRAC CONE; SURFACE; BI2TE3;

D O I：

10.1103/PhysRevB.82.041104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An infinitely thin solenoid carrying magnetic flux Phi (a "Dirac string") inserted into an ordinary band insulator has no significant effect on the spectrum of electrons. In a strong topological insulator, remarkably, such a solenoid carries protected gapless one-dimensional fermionic modes when Phi = hc/2e. These modes are spin-filtered and represent a distinct bulk manifestation of the topologically nontrivial insulator. We establish this "wormhole" effect by both general qualitative considerations and by numerical calculations within a minimal lattice model. We also discuss the possibility of experimental observation of a closely related effect in artificially engineered nanostructures.

引用

页数：4

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