Josephson effect in noncentrosymmetric superconductor junctions
Josephson effect in noncentrosymmetric superconductor junctions
复制标题
DOI：
10.1103/physrevb.84.064526
复制
发表时间：
2011-07
影响因子：
3.7
通讯作者：
Y. Asano;S. Yamano
中科院分区：
文献类型：
--
作者：
Y. Asano;S. Yamano
讨论了两个非中心对称超导体间的约瑟夫森电流。自旋单态和螺旋p波自旋三态之间超导序参量的共存丰富了约瑟夫森电流的各种低温行为，取决于它们的相对振幅。我们将证明，约瑟夫森电流的特征行为为S>� T是明显不同的那些为� S <� T。拓扑保护的零能表面束缚态是造成这种明显差异的原因。我们得出结论，约瑟夫森电流很好地反映了非中心对称超导体的拓扑表面态和对对称性的特征。
We discuss the Josephson current between two noncentrosymmetric superconductors. The coexistence of superconducting order parameters between the spin-singletS and the helical p-wave spin-tripletT enriches a variety of low-temperature behavior of the Josephson current depending on their relative amplitudes. We will show that characteristic behaviors of the Josephson current forS >� T are clearly different from those for � S <� T. The topologically protected zero-energysurface bound states are responsible for the clear difference. We conclude that the Josephson current reflects well the character of the topological surface states and the pairing symmetry of noncentrosymmetric superconductors.