Intrinsic supercurrent non-reciprocity coupled to the crystal structure of a van der Waals Josephson barrier.

ABSTRACT: Non-reciprocal electronic transport in a spatially homogeneous system arises from the simultaneous breaking of inversion and time-reversal symmetries. Superconducting and Josephson diodes, a key ingredient for future non-dissipative quantum devices, have recently been realized. Only a few examples of a vertical superconducting diode effect have been reported and its mechanism, especially whether intrinsic or extrinsic, remains elusive. Here we demonstrate a substantial supercurrent non-reciprocity in a van der Waals vertical Josephson junction formed with a T_d-WTe₂ barrier and NbSe₂ electrodes that clearly reflects the intrinsic crystal structure of T_d-WTe₂. The Josephson diode efficiency increases with the T_d-WTe₂

SUBMITTER: Kim JK 

PROVIDER: S-EPMC10847146 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature