Superconducting diode effect under time reversal symmetry
Abstract
In noncentrosymmetric superconductors, superconducting and normal conductions can interchange based on the current flow direction. This effect is termed a superconducting diode effect (SDE), which is a focal point of recent research. The broken inversion and time reversal symmetry is believed to be the requirements of SDE but their intrinsic role has remained elusive. Here, we report strain-controlled SDEs in a layered trigonal superconductor, PbTaSe2. The SDE was found exclusively in a strained device with its absence in an unstrained device, despite that it is allowed in unstrained trigonal structure. Moreover, the zero-field or magnetic field-even (magnetic field-odd) SDE is observed when the strain and current are along armchair (zigzag) direction The results unambiguously demonstrate the intrinsic SDE under time-reversal symmetry and the critical role of strain-induced electric polarization.
Cite
@article{arxiv.2406.08157,
title = {Superconducting diode effect under time reversal symmetry},
author = {Fengshuo Liu and Yuki M. Itahashi and Shunta Aoki and Yu Dong and Ziqian Wang and Naoki Ogawa and Toshiya Ideue and Yoshihiro Iwasa},
journal= {arXiv preprint arXiv:2406.08157},
year = {2024}
}
Comments
35 pages, 11 figures