Unconventional Josephson Signatures of Majorana Bound States

被引:145
|
作者
Jiang, Liang [1 ]
Pekker, David [1 ]
Alicea, Jason [2 ]
Refael, Gil [1 ]
Oreg, Yuval [3 ]
von Oppen, Felix [4 ,5 ]
机构
[1] CALTECH, Dept Phys, Pasadena, CA 91125 USA
[2] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[3] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel
[4] Free Univ Berlin, Dahlem Ctr Complex Quantum Syst, D-14195 Berlin, Germany
[5] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany
关键词
TOPOLOGICAL QUANTUM COMPUTATION; SUPERCONDUCTORS; ANYONS;
D O I
10.1103/PhysRevLett.107.236401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A junction between two topological superconductors containing a pair of Majorana fermions exhibits a "fractional" Josephson effect, 4 pi periodic in the superconductors' phase difference. An additional fractional Josephson effect, however, arises when the Majorana fermions are spatially separated by a superconducting barrier. This new term gives rise to a set of Shapiro steps which are essentially absent without Majorana modes and therefore provides a unique signature for these exotic states.
引用
收藏
页数:5
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