Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices

被引：3546

作者：

Mourik, V. ^{[1
]}

Zuo, K. ^{[1
]}

Frolov, S. M. ^{[1
]}

Plissard, S. R. ^{[2
]}

Bakkers, E. P. A. M. ^{[1
,2
]}

Kouwenhoven, L. P. ^{[1
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, NL-2600 GA Delft, Netherlands

[2] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands

来源：

SCIENCE | 2012年 / 336卷 / 6084期

基金：

欧洲研究理事会;

关键词：

ANDREEV BOUND-STATES; QUANTUM-DOT;

D O I：

10.1126/science.1222360

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Majorana fermions are particles identical to their own antiparticles. They have been theoretically predicted to exist in topological superconductors. Here, we report electrical measurements on indium antimonide nanowires contacted with one normal (gold) and one superconducting (niobium titanium nitride) electrode. Gate voltages vary electron density and define a tunnel barrier between normal and superconducting contacts. In the presence of magnetic fields on the order of 100 millitesla, we observe bound, midgap states at zero bias voltage. These bound states remain fixed to zero bias, even when magnetic fields and gate voltages are changed over considerable ranges. Our observations support the hypothesis of Majorana fermions in nanowires coupled to superconductors.

引用

页码：1003 / 1007

页数：5

共 32 条

[31] Majorana Bound States without Vortices in Topological Superconductors with Electrostatic Defects [J].