Superconducting proximity effect and Majorana fermions at the surface of a topological insulator

被引：4104

作者：

Fu, Liang ^{[1
]}

Kane, C. L. ^{[1
]}

机构：

[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.096407

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the proximity effect between an s-wave superconductor and the surface states of a strong topological insulator. The resulting two-dimensional state resembles a spinless p(x) + ip(y) superconductor, but does not break time reversal symmetry. This state supports Majorana bound states at vortices. We show that linear junctions between superconductors mediated by the topological insulator form a nonchiral one-dimensional wire for Majorana fermions, and that circuits formed from these junctions provide a method for creating, manipulating, and fusing Majorana bound states.

引用

页数：4

共 30 条

[1] Quantum spin Hall effect and topological phase transition in HgTe quantum wells [J].

Bernevig, B. Andrei ;

Hughes, Taylor L. ;

Zhang, Shou-Cheng .

SCIENCE, 2006, 314 (5806) :1757-1761

[2] Observing Majorana bound states in p-wave superconductors using noise measurements in tunneling experiments [J].

Bolech, C. J. ;

Demler, Eugene .

PHYSICAL REVIEW LETTERS, 2007, 98 (23)

[3] IDENTIFICATION OF P-WAVE SUPERCONDUCTORS [J].

BUCHHOLTZ, LJ ;

ZWICKNAGL, G .

PHYSICAL REVIEW B, 1981, 23 (11) :5788-5796

[4] Evidence for a proximity-induced energy gap in Nb/InAs/Nb junctions [J].

Chrestin, A ;

Matsuyama, T ;

Merkt, U .

PHYSICAL REVIEW B, 1997, 55 (13) :8457-8465

[5]

DASSARMA S, 2006, PHYS REV B, V73, P5004

[6] A modular functor which is universal for quantum computation [J].

Freedman, MH ;

Larsen, M ;

Wang, ZH .

COMMUNICATIONS IN MATHEMATICAL PHYSICS, 2002, 227 (03) :605-622

[7] Topological insulators in three dimensions [J].

Fu, Liang ;

Kane, C. L. ;

Mele, E. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[8] Topological insulators with inversion symmetry [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW B, 2007, 76 (04)

[9] Quantum phase transitions across a p-wave Feshbach resonance -: art. no. 230403 [J].

Gurarie, V ;

Radzihovsky, L ;

Andreev, AV .

PHYSICAL REVIEW LETTERS, 2005, 94 (23)

[10] Non-abelian statistics of half-quantum vortices in p-wave superconductors [J].

Ivanov, DA .

PHYSICAL REVIEW LETTERS, 2001, 86 (02) :268-271

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