Nonreciprocal transport is a fundamental property of semiconducting-based electronics and the possibility of extending this to superconducting circuits without external magnetic field is a promising but challenging field of research. Here, the authors report a field-free superconducting diode effect for 2H-NbSe2 Josephson junctions with the results suggesting the existence of spontaneous time-reversal symmetry breaking.
- Jiaxiang Ma
- Huiyu Wang
- Xian-Hui Chen
