Supercurrent in the Presence of Direct Transmission and a Resonant Localized State

Supercurrent in the Presence of Direct Transmission and a Resonant Localized State

Levajac, V. (TU Delft QRD/Kouwenhoven Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Barakov, H.S. (TU Delft QN/Nazarov Group; Kavli institute of nanoscience Delft)
Mazur, G.P. (TU Delft QRD/Wimmer Group; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
van Loo, N. (TU Delft QRD/Kouwenhoven Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Kouwenhoven, Leo P. (TU Delft QN/Kouwenhoven Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft)
Nazarov, Y.V. (TU Delft QN/Nazarov Group; Kavli institute of nanoscience Delft)
Wang, Ji Yin (Kavli institute of nanoscience Delft; Beijing Academy of Quantum Information Sciences, Beijing)

2024

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 π 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.

http://resolver.tudelft.nl/uuid:9a3fb9d0-9a2b-45f6-9d7d-3cfaa4f6e038

https://doi.org/10.1103/PhysRevLett.132.176304

0031-9007

Physical Review Letters, 132 (17)

Institutional Repository

journal article

© 2024 V. Levajac, H.S. Barakov, G.P. Mazur, N. van Loo, Leo P. Kouwenhoven, Y.V. Nazarov, Ji Yin Wang