Observation of nonreciprocal superconducting critical field
Observation of nonreciprocal superconducting critical field
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DOI：
10.35848/1882-0786/ac03c0
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发表时间：
2021-07-01
影响因子：
2.3
通讯作者：
Ono, Teruo
中科院分区：
文献类型：
--
作者：
Miyasaka, Yuta;Kawarazaki, Ryo;Ono, Teruo
我们报道了在没有反转中心的超导[Nb/V/Ta](n)超晶格中，在电流偏置下，超导临界磁场可以是不可逆的。临界磁场显示出正负磁场之间明显的差异。此外，当电流方向反转时，正负临界磁场之间的大小关系也反转。我们的研究结果表明，通过施加电流，超导间隙可以是各向异性的。
We report that the superconducting critical magnetic field can be nonreciprocal under a bias of an electric current in a superconducting [Nb/V/Ta]( n ) superlattice without a center of inversion. The critical magnetic field showed a clear difference between positive and negative magnetic fields. Furthermore, the magnitude relation between the positive and negative critical magnetic fields is reversed when the direction of the electric current is reversed. Our findings indicate that the superconducting gap can be anisotropic by the application of an electric current.