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Supercurrent in the presence of direct transmission and a resonant localized state

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arxiv 2310.03296 v1 pith:SOLIYZ6N submitted 2023-10-05 cond-mat.mes-hall cond-mat.supr-con

Supercurrent in the presence of direct transmission and a resonant localized state

Vukan Levajac , Hristo Barakov , Grzegorz P. Mazur , Nick van Loo , Leo P. Kouwenhoven , Yuli V. Nazarov , Ji-Yin Wang This is my paper
classification cond-mat.mes-hall cond-mat.supr-con
keywords gatemagneticsupercurrentdirectfieldsintervalsjunctionlocalized
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

We study the current-phase relation (CPR) of an InSb-Al nanowire Josephson junction in parallel magnetic fields up to $700$\,mT. At high magnetic fields and in narrow voltage intervals of a gate under the junction, the CPR exhibits $\pi$-shifts. The supercurrent declines within these gate intervals and shows asymmetric gate voltage dependence above and below them. We detect these features sometimes also at zero magnetic field. The observed CPR properties are reproduced by a theoretical model of supercurrent transport via interference between direct transmission and a resonant localized state.

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