高温铜酸盐中的无磁场高温超导二极管效应

High-temperature field-free superconducting diode effect in high-T cuprates.

作者信息

Qi Shichao, Ge Jun, Ji Chengcheng, Ai Yiwen, Ma Gaoxing, Wang Ziqiao, Cui Zihan, Liu Yi, Wang Ziqiang, Wang Jian

机构信息

International Center for Quantum Materials, School of Physics, Peking University, Beijing, China.

Hefei National Laboratory, Hefei, China.

出版信息

Nat Commun. 2025 Jan 9;16(1):531. doi: 10.1038/s41467-025-55880-4.

DOI:10.1038/s41467-025-55880-4

PMID:39788968

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11718281/

Abstract

The superconducting diode effect (SDE) is defined by the difference in the magnitude of critical currents applied in opposite directions. It has been observed in various superconducting systems and attracted high research interests. However, the operating temperature of the SDE is typically low and/or the sample structure is rather complex. For the potential applications in non-dissipative electronics, efficient superconducting diodes working in zero magnetic field with high operating temperatures and a simple configuration are highly desired. 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) cuprate superconductor BiSrCaCuO (BSCCO) flake devices. The rectification effect persists beyond two hundred sweeping cycles, confirming the stability of the superconducting diode. Our results offer promising developments for potential applications in non-dissipative electronics, and provide insights into the mechanism of field-free SDE and symmetry breakings in high-T superconductors.

摘要

超导二极管效应（SDE）由施加在相反方向的临界电流大小差异来定义。它已在各种超导系统中被观测到，并引起了高度的研究兴趣。然而，SDE的工作温度通常较低和/或样品结构相当复杂。对于无耗散电子学中的潜在应用而言，非常需要在零磁场下工作、具有高工作温度且结构简单的高效超导二极管。在此，我们报告在高转变温度（高T）铜酸盐超导体BiSrCaCuO（BSCCO）薄片器件中观测到零磁场下的SDE，其工作温度高达72 K，在53 K时效率高达22%。整流效应在超过两百个扫描周期后仍然存在，证实了超导二极管的稳定性。我们的结果为无耗散电子学的潜在应用提供了有前景的发展方向，并为零场SDE的机制以及高T超导体中的对称性破缺提供了见解。