Affiliation:
1. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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 directionsIc+/Ic−≈ 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.
Publisher
American Association for the Advancement of Science (AAAS)
Reference39 articles.
1. Observation of superconducting diode effect
2. L. Bauriedl C. Bäuml L. Fuchs C. Baumgartner N. Paulik J. M. Bauer K.-Q. Lin J. M. Lupton T. Taniguchi K. Watanabe C. Strunk N. Paradiso Supercurrent diode effect and magnetochiral anisotropy in few-layer NbSe 2 . arXiv:2110.15752 [cond-mat.supr-con] (29 October 2021).
3. J. Shin S. Son J. Yun G. Park K. Zhang Y. J. Shin J.-G. Park D. Kim Magnetic proximity-induced superconducting diode effect and infinite magnetoresistance in van der Waals heterostructure. arXiv:2111.05627 [cond-mat.supr-con] (10 November 2021).
4. Gapless Andreev bound states in the quantum spin Hall insulator HgTe
5. H. Wu Y. Wang P. K. Sivakumar C. Pasco U. Filippozzi S. S. P. Parkin Y.-J. Zeng T. McQueen M. N. Ali Realization of the field-free Josephson diode. arXiv:2103.15809 (29 March 2021).
Cited by
90 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献