Intrinsic Superconducting Diode Effect
Intrinsic Superconducting Diode Effect
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DOI：
10.1103/physrevlett.128.037001
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发表时间：
2022-01-21
影响因子：
8.6
通讯作者：
Yanase, Youichi
中科院分区：
文献类型：
--
作者：
Daido, Akito;Ikeda, Yuhei;Yanase, Youichi
受最近实验的刺激[F。Ando等人，Nature（伦敦）584，373（2020）.]，我们提出了一种导致超导二极管效应（超导二极管效应）的内在机制。超导体是指金属-超导体转变的临界电流的非互易性。在临界电流的各种机制中，已知退配对电流是每种材料固有的，并且最近在几个超导系统中观察到。我们澄清的温度标度附近的临界温度的非互易性破坏电流，并指出其显着的增强在低温下。研究还发现，非互易临界电流随磁场的增加而发生符号反转。这些行为可以通过朗道临界动量的非互易性和螺旋超导性质的变化来理解。内禀超导体揭示了非中心对称超导体丰富的相图和功能。
Stimulated by the recent experiment [F. Ando et al., Nature (London) 584, 373 (2020).], we propose an intrinsic mechanism to cause the superconducting diode effect (SDE). SDE refers to the nonreciprocity of the critical current for the metal-superconductor transition. Among various mechanisms for the critical current, the depairing current is known to be intrinsic to each material and has recently been observed in several superconducting systems. We clarify the temperature scaling of the nonreciprocal depairing current near the critical temperature and point out its significant enhancement at low temperatures. It is also found that the nonreciprocal critical current shows sign reversals upon increasing the magnetic field. These behaviors are understood by the nonreciprocity of the Landau critical momentum and the change in the nature of the helical superconductivity. The intrinsic SDE unveils the rich phase diagram and functionalities of noncentrosymmetric superconductors.