Polarity Reversal of Josephson Diode through Spin-Orbit Coupling

ORAL

Abstract

We report polarity control of Josephson diode effect (JDE) in epitaxial Al-InAs Josephson junctions through gate voltages. Our theoretical model to explain this effect focuses on the interplay between finite Cooper-pair momentum (fCPM) and anisotropic spin-orbit coupling (SOC). We identify that these two sources of JDE influence the JDE polarity distinctively with respect to the strength of in-plane magnetic fields. As a result, local electric fields due to gate voltages control the polarity of JDE, demonstrating electric control of JDE polarity through anisotropic SOC. Our results suggest a novel approach for controlling non-reciprocal supercurrents with possible applications in superconducting electronics.

–

Publication: Shin, J. et al. Electric Control of Polarity in Spin-Orbit Josephson Diode. Preprint at https://arxiv.org/abs/2409.17820 (2024).

Presenters

  • Junghyun Shin

    • Pohang University of Science and Technology (POSTECH)

Authors

  • Junghyun Shin

    • Pohang University of Science and Technology (POSTECH)

  • Jae-Ho Han

    • Korea Advanced Institute of Science and Technology (KAIST)

  • Anjali Rathore

    • University of Tennessee

  • Joon Sue Lee

    • University of Tennessee
    • University of Tennessee, Knoxville

  • Seung-Bo Shim

    • Korea Research Institute of Standards and Science (KRISS)
    • Quantum Technology Institute, Korea Research Institute of Standards and Science (KRISS)

  • Jinwoong Cha

    • Korea Research Institute of Standards and Science (KRISS)

  • Sunghun Park

    • Institute for Basic Science (IBS)

  • Junho Suh

    • Pohang University of Science and Technology (POSTECH)
    • Pohang Univ of Sci & Tech