Disappearance of ensemble-averaged Josephson current in dirty superconductor-normal-superconductor junctions of d-wave superconductors
Disappearance of ensemble-averaged Josephson current in dirty superconductor-normal-superconductor junctions of d-wave superconductors
复制标题
d 波超导体脏超导-正常超导结中系综平均约瑟夫森电流的消失
DOI：
10.1103/physrevb.64.014511
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发表时间：
2001
影响因子：
3.7
通讯作者：
Y. Asano
中科院分区：
文献类型：
--
作者：
Y. Asano
我们讨论了超导体/脏正常导体/超导体结中的约瑟夫森电流，其中超导体具有${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$对对称性。约瑟夫森电流的低温行为取决于晶体轴与结界面法线之间的取向角。结果表明，当取向角为$\ensuremath{\pi}/4$时，正常导体处于扩散输运状态时，系整体平均约瑟夫森电流消失。${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$-波对对称性是造成这一事实的原因。
We discuss the Josephson current in superconductor/dirty normal conductor/superconductor junctions, where the superconductors have ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ pairing symmetry. The low-temperature behavior of the Josephson current depends on the orientation angle between the crystalline axis and the normal of the junction interface. We show that the ensemble-averaged Josephson current vanishes when the orientation angle is $\ensuremath{\pi}/4$ and the normal conductor is in the diffusive transport regime. The ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$-wave pairing symmetry is responsible for this fact.