Theory of the proximity effect in two-dimensional unconventional
Theory of the proximity effect in two-dimensional unconventional
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二维非常规邻近效应理论
DOI：
10.1103/physrevb.99.184501
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发表时间：
2019
影响因子：
3.7
通讯作者：
S. Tamura and Y. Tanaka
中科院分区：
文献类型：
--
作者：
Iimura Shoma;Hirayama Motoaki;Hoshino Shintaro;S. Tamura and Y. Tanaka
我们研究了扩散普通金属（DN）/非常规超导结中的异常邻近效应，其中由于奇数频率自旋三重态波配对的穿透，DN中的局域态密度（LDOS）具有零能量峰值。在这项研究中，我们考虑存在 Rashba 自旋轨道耦合 (RSOC) 的基底上的二维非常规超导体，其中 Rashba 矢量平行于方向。最初在自旋三线态波超导结中预测的反常邻近效应对 RSOC 很敏感。随着 的增加而消失。另一方面，反常邻近效应可以通过自旋单线波超导结中的大值来开启。由此产生的零能量 LDOS 和奇频自旋三重态波对振幅的大小随着 的增加而增加。
We study the anomalous proximity effect in diffusive normal metal (DN)/unconventional superconductor junctions, where the local density of states (LDOS) in the DN has a zero-energy peak due to the penetration of the odd-frequency spin-triplet-wave pairing. In this study, we consider a two-dimensional unconventional superconductor on the substrate in the presence of a Rashba spin-orbit coupling (RSOC), where the Rashba vector is parallel to thedirection. The anomalous proximity effect, originally predicted in spin-triplet-wave superconductor junctions, is sensitive to the RSOC. It disappears with the increase of. On the other hand, the anomalous proximity effect can be switched on by the largevalues in the spin-singlet-wave superconductor junctions. The resulting zero-energy LDOS and the magnitude of the odd-frequency spin-triplet-wave pair amplitude increase with the increase of.