Charged-impurity-induced Majorana fermions in topological superconductors

被引：6

作者：

Zhou, Tao ^{[1
]}

Li, Xiao-Jing ^{[1
]}

Gao, Yi ^{[2
,3
]}

Wang, Z. D. ^{[4
,5
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 210016, Jiangsu, Peoples R China

[2] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Jiangsu, Peoples R China

[3] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Jiangsu, Peoples R China

[4] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[5] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 01期

关键词：

NANOWIRE; STATES; SIGNATURE;

D O I：

10.1103/PhysRevB.91.014512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study numerically Majorana fermions (MFs) induced by a charged impurity in topological superconductors. It is revealed from the relevant Bogoliubov-de Gennes equations that (i) for quasi-one-dimensional systems, a pair of MFs are bounded at the two sides of one charged impurity and are well-separated; and (ii) for a two-dimensional square lattice, the charged-impurity-induced MFs are similar to the known pair of vortex-induced MFs, in which one MF is bounded by the impurity while the other appears at the boundary. Moreover, the corresponding local density of states is explored, demonstrating that the presence of MF states may be tested experimentally.

引用

页数：6

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