Spin-Orbit induced phase-shift in Bi2Se3 Josephson junctions

被引：117

作者：

Assouline, Alexandre ^{[1
,2
]}

Feuillet-Palma, Cheryl ^{[1
]}

Bergeal, Nicolas ^{[1
]}

Zhang, Tianzhen ^{[1
]}

Mottaghizadeh, Alireza ^{[1
,5
]}

Zimmers, Alexandre ^{[1
]}

Lhuillier, Emmanuel ^{[3
]}

Eddrie, Mahmoud ^{[3
]}

Atkinson, Paola ^{[3
]}

Aprili, Marco ^{[4
]}

Aubin, Herve ^{[1
,6
]}

机构：

[1] UPMC Univ Paris 6, Sorbonne Univ, CNRS, PSL Res Univ,LPEM,ESPCI Paris, 10 Rue Vauquelin, F-75005 Paris, France

[2] CEA Saclay, IRAMIS, CNRS UMR 3680, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

[3] UPMC Univ Paris 06, CNRS UMR 7588, Inst NanoSci Paris, Sorbonne Univ, 4 Pl Jussieu, F-75005 Paris, France

[4] Univ Paris Saclay, Univ Paris Sud, CNRS, Lab Phys Solides, F-91405 Orsay, France

[5] Khatam Univ, 30 Hakim Azam St, Tehran 1991633356, Iran

[6] Univ Paris Saclay, Univ Paris Sud, CNRS, Ctr Nanosci & Nanotechnol,C2N, F-91120 Palaiseau, France

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

关键词：

FERROMAGNET;

D O I：

10.1038/s41467-018-08022-y

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：

The transmission of Cooper pairs between two weakly coupled superconductors produces a superfluid current and a phase difference; the celebrated Josephson effect. Because of time-reversal and parity symmetries, there is no Josephson current without a phase difference between two superconductors. Reciprocally, when those two symmetries are broken, an anomalous supercurrent can exist in the absence of phase bias or, equivalently, an anomalous phase shift phi(0) can exist in the absence of a superfluid current. We report on the observation of an anomalous phase shift phi(0) in hybrid Josephson junctions fabricated with the topological insulator Bi2Se3 submitted to an in-plane magnetic field. This anomalous phase shift phi(0) is observed directly through measurements of the current-phase relationship in a Josephson interferometer. This result provides a direct measurement of the spin-orbit coupling strength and open new possibilities for phase-controlled Josephson devices made from materials with strong spin-orbit coupling.

引用

页数：8

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