Anomalous inverse proximity effect in unconventional superconductor junctions
Anomalous inverse proximity effect in unconventional superconductor junctions
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非常规超导结中的反常邻近效应
DOI：
10.1103/physrevresearch.3.043148
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发表时间：
2021
影响因子：
4.2
通讯作者：
Tanaka Yukio
中科院分区：
文献类型：
--
作者：
Suzuki Shu-Ichiro;Hirai Takashi;Eschrig Matthias;Tanaka Yukio
我们研究了非常规配对导致的Andreev束缚态对铁磁体/超导体结逆接近效应的影响。利用准经典的Eilenberger理论，我们得到了穿透超导体的磁化强度。结果表明，在较宽的参数范围内，感应磁化方向由两个因素决定：结界面上是否存在Andreev束缚态和自旋混合角的符号。特别是当界面处出现Andreev束缚态时，感应磁化方向与不存在Andreev束缚态时相反。我们还澄清了产生反向感应磁化的条件。分析这种效应有助于区分超导体的配对对称性。
We investigate the effects of Andreev bound states due to the unconventional pairing on the inverse proximity effect of ferromagnet/superconductor junctions. Utilizing quasiclassical Eilenberger theory, we obtain the magnetization penetrating into the superconductor. We show that in a wide parameter range the direction of the induced magnetization is determined by two factors: whether Andreev bound states are present at the junction interface and the sign of the spin-mixing angle. In particular, when Andreev bound states appear at the interface, the direction of the induced magnetization is opposite to that without Andreev bound states. We also clarify the conditions under which an inverted induced magnetization appears. Analyzing this effect helps distinguishing the pairing symmetry of a superconductor.