Relating Andreev Bound States and Supercurrents in Hybrid Josephson Junctions

被引：69

作者：

Nichele, F. ^{[1
,2
,3
]}

Portoles, E. ^{[1
,2
]}

Fornieri, A. ^{[1
,2
]}

Whiticar, A. M. ^{[1
,2
]}

Drachmann, A. C. C. ^{[1
,2
]}

Gronin, S. ^{[5
,8
]}

Wang, T. ^{[4
,5
]}

Gardner, G. C. ^{[5
,8
]}

Thomas, C. ^{[4
,5
]}

Hatke, A. T. ^{[4
,5
]}

Manfra, M. J. ^{[4
,5
,6
,7
,8
]}

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

机构：

[1] Univ Copenhagen, Niels Bohr Inst, Ctr Quantum Devices, Univ Parken 5, DK-2100 Copenhagen, Denmark

[2] Univ Copenhagen, Niels Bohr Inst, Microsoft Quantum Lab Copenhagen, Univ Parken 5, DK-2100 Copenhagen, Denmark

[3] IBM Res Zurich, Saumerstr 4, CH-8803 Ruschlikon, Switzerland

[4] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA

[5] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

[6] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA

[7] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

[8] Purdue Univ, Microsoft Quantum Purdue, W Lafayette, IN 47907 USA

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 22期

基金：

欧洲研究理事会; 新加坡国家研究基金会;

关键词：

TOPOLOGICAL SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevLett.124.226801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate concomitant measurement of phase-dependent critical current and Andreev bound state spectrum in a highly transmissive InAs Josephson junction embedded in a dc superconducting quantum interference device (SQUID). Tunneling spectroscopy reveals Andreev bound states with near unity transmission probability. A nonsinusoidal current-phase relation is derived from the Andreev spectrum, showing excellent agreement with the one extracted from the SQUID critical current. Both measurements are reconciled within a short junction model where multiple Andreev bound states, with various transmission probabilities, contribute to the entire supercurrent flowing in the junction.

引用

页数：6

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