Strong anomalous proximity effect from spin-singlet superconductors
Strong anomalous proximity effect from spin-singlet superconductors
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DOI：
10.1103/physrevb.104.l020502
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发表时间：
2021-04
影响因子：
3.7
通讯作者：
S. Ikegaya;Jaechul Lee;A. Schnyder;Y. Asano
中科院分区：
文献类型：
--
作者：
S. Ikegaya;Jaechul Lee;A. Schnyder;Y. Asano
自旋三重态px波超导体与脏的正常金属的邻近效应导致了各种不寻常的电磁性质，反映了拓扑保护的零能准粒子与奇频库珀对之间的合作关系。然而，由于缺乏自旋三重态px波超导体的候选材料，观察这种效应一直很困难。在本文中，我们证明了异常邻近效应，这是一个自旋三重态的px波超导体，可以发生在半导体/高温铜氧化物超导体混合装置中，其中两个潜在的共存：自旋单重d波对电位和自旋轨道耦合电位维持持续的自旋螺旋状态。因此，我们提出了一个替代的和有前途的路线来观察拓扑保护准粒子和奇频库珀对的深刻性质相关的异常邻近效应。
The proximity effect from a spin-triplet px-wave superconductor to a dirty normal-metal has been shown to result in various unusual electromagnetic properties, reflecting a cooperative relation between topologically protected zero-energy quasiparticles and odd-frequency Cooper pairs. However, because of a lack of candidate materials for spin-triplet px-wave superconductors, observing this effect has been difficult. In this paper, we demonstrate that the anomalous proximity effect, which is essentially equivalent to that of a spin-triplet px-wave superconductor, can occur in a semiconductor/high-Tc cuprate superconductor hybrid device in which two potentials coexist: a spin-singlet d-wave pair potential and a spin–orbit coupling potential sustaining the persistent spin-helix state. As a result, we propose an alternative and promising route to observe the anomalous proximity effect related to the profound nature of topologically protected quasiparticles and odd-frequency Cooper pairs.