Evidence for Spin-Triplet Electron Pairing in the Proximity-Induced Superconducting State of an Fe-Doped InAs Semiconductor
Evidence for Spin-Triplet Electron Pairing in the Proximity-Induced Superconducting State of an Fe-Doped InAs Semiconductor
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Fe 掺杂 InAs 半导体邻近感应超导态中自旋三重态电子配对的证据
DOI：
10.1103/physrevlett.122.107001
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发表时间：
2019
影响因子：
8.6
通讯作者：
and Katsumoto Shingo
中科院分区：
文献类型：
--
作者：
Nakamura Taketomo;Anh Le Duc;Hashimoto Yoshiaki;Ohya Shinobu;Tanaka Masaaki;and Katsumoto Shingo
我们提供了铁磁半导体（In，Fe）As中邻近诱导超导电性中自旋三重态电子配对的证据。正如在半金属材料中发现的那样，观察到非常长的邻近范围。更令人惊讶的是，超导区域的边缘有非常强的超电流集中，这是从临界电流与磁场的极端持续振荡中推断出来的。临界电流的最大值并不出现在零磁通量处，而是出现在最大磁无序附近，反映了自旋三重态和单重态配对之间的连通性。这些自旋三重态性质在邻近超导性中也揭示了（In，Fe）As的铁磁性质。
We provide evidence for spin-triplet electron pairing in proximity-induced superconductivity in a ferromagnetic semiconductor (In,Fe)As. As discovered in half-metallic materials, an extraordinarily long proximity range is observed. More surprising is a very strong concentration of supercurrent to the edges of the superconducting region, which is deduced from the extremely persistent oscillation of the critical current vs magnetic field. The maxima of the critical current appear not at the zero magnetic flux but at around the maximum magnetic disorder, reflecting the connectivity between the spin-triplet and singlet pairings. These spin-triplet natures in proximity superconductivity also reveal ferromagnetic properties of (In,Fe)As.