Superconducting devices with broken time-reversal and spatial-inversion symmetries can exhibit novel superconducting phenomena. The observation of superconducting diode effects, which is applicable for dissipationless rectification, provides information on the breaking of such symmetries. We experimentally study a Josephson junction (JJ) coupled to another adjacent JJ as a new system exhibiting the superconducting diode effect. We demonstrate that the observed superconducting diode effect can be controlled non-locally based on the phase difference with the adjacent JJ. These results indicate that the time-reversal and spatial-inversion symmetries of a JJ are broken by the coherent coupling to an adjacent JJ, and this enables the engineering of novel superconducting phenomena mediated by coherent coupling among JJs and development of their applications for superconducting diode devices.
@article{arxiv.2305.07923,
title = {Josephson diode effect derived from short-range coherent coupling},
author = {Sadashige Matsuo and Takaya Imoto and Tomohiro Yokoyama and Yosuke Sato and Tyler Lindemann and Sergei Gronin and Geoffrey C. Gardner and Michael J. Manfra and Seigo Tarucha},
journal= {arXiv preprint arXiv:2305.07923},
year = {2023}
}