High-temperature field-free superconducting diode effect in high-T c cuprates by Shichao Qi, Jun Ge, Chengcheng Ji, Yiwen Ai, Gaoxing Ma, Ziqiao Wang, Zihan Cui, Yi Liu, Ziqiang Wang, Jian Wang

“…Here, we report the observation of a SDE under zero magnetic field with operating temperatures up to 72 K and efficiency as high as 22% at 53 K in high-transition-temperature (high-T c) cuprate superconductor Bi2Sr2CaCu2O8+δ (BSCCO) flake devices. The rectification effect persists beyond two hundred sweeping cycles, confirming the stability of the superconducting diode. …”
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