Universal Josephson diode effect
Name
sciadv.abo0309.pdf
Description
Published version
Size
294.45 KB
Format
Adobe PDF
Checksum (MD5)
1b4ff1dbc10581131e2f804226acef80
Author(s)
Davydova, Margarita
Prembabu, Saranesh
Fu, Liang
Date Issued
2022
Journal
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Davydova, Margarita, Prembabu, Saranesh and Fu, Liang. 2022. "Universal Josephson diode effect." Science Advances, 8 (23).
Version
Final published version
Abstract
We propose a universal mechanism for the Josephson diode effect in short Josephson junctions. The proposed mechanism is due to finite Cooper pair momentum and is a manifestation of simultaneous breaking of inversion and time-reversal symmetries. The diode efficiency is up to 40%, which corresponds to an asymmetry between the critical currents in opposite directions I c+ / I c− ≈ 230%. We show that this arises from both the Doppler shift of the Andreev bound state energies and the phase-independent asymmetric current from the continuum. Last, we propose a simple scheme for achieving finite-momentum pairing, which does not rely on spin-orbit coupling and thus greatly expands existing platforms for the observation of supercurrent diode effects.
We propose a universal mechanism for the Josephson diode effect in short Josephson junctions. The proposed mechanism is due to finite Cooper pair momentum and is a manifestation of simultaneous breaking of inversion and time-reversal symmetries. The diode efficiency is up to 40%, which corresponds to an asymmetry between the critical currents in opposite directions I c+ / I c− ≈ 230%. We show that this arises from both the Doppler shift of the Andreev bound state energies and the phase-independent asymmetric current from the continuum. Last, we propose a simple scheme for achieving finite-momentum pairing, which does not rely on spin-orbit coupling and thus greatly expands existing platforms for the observation of supercurrent diode effects.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1126/SCIADV.ABO0309
