Majorana bound state in a coupled quantum-dot hybrid-nanowire system

被引：912

作者：

Deng, M. T. ^{[1
,2
,3
]}

Vaitiekenas, S. ^{[1
,2
,4
]}

Hansen, E. B. ^{[1
,2
]}

Danon, J. ^{[1
,2
,5
]}

Leijnse, M. ^{[1
,2
,6
]}

Flensberg, K. ^{[1
,2
]}

Nygard, J. ^{[1
,2
]}

Krogstrup, P. ^{[1
,2
]}

Marcus, C. M. ^{[1
,2
]}

机构：

[1] Univ Copenhagen, Ctr Quantum Devices, DK-2100 Copenhagen, Denmark

[2] Univ Copenhagen, Niels Bohr Inst, Stn Copenhagen Q, DK-2100 Copenhagen, Denmark

[3] Natl Univ Def Technol, State Key Lab High Performance Comp, Changsha 410073, Hunan, Peoples R China

[4] Free Univ Berlin, Dept Phys, Arnimallee 14, D-14195 Berlin, Germany

[5] Univ Copenhagen, Niels Bohr Int Acad, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[6] Lund Univ, Div Solid State Phys & NanoLund, Box 118, S-22100 Lund, Sweden

来源：

SCIENCE | 2016年 / 354卷 / 6319期

基金：

新加坡国家研究基金会; 瑞典研究理事会;

关键词：

BIAS CONDUCTANCE PEAK; TOPOLOGICAL SUPERCONDUCTOR; FERMIONS; PARITY; GAP;

D O I：

10.1126/science.aaf3961

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：

Hybrid nanowires combining semiconductor and superconductor materials appear well suited for the creation, detection, and control of Majorana bound states (MBSs). We demonstrate the emergence of MBSs from coalescing Andreev bound states (ABSs) in a hybrid InAs nanowire with epitaxial Al, using a quantum dot at the end of the nanowire as a spectrometer. Electrostatic gating tuned the nanowire density to a regime of one or a few ABSs. In an applied axial magnetic field, a topological phase emerges in which ABSs move to zero energy and remain there, forming MBSs. We observed hybridization of the MBS with the end-dot bound state, which is in agreement with a numerical model. The ABS/MBS spectra provide parameters that are useful for understanding topological superconductivity in this system.

引用

页码：1557 / 1562

页数：6

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