Theory of the magnetic response in finite two-dimensional superconductors

F. Sebastian Bergeret; Ilya V. Tokutly

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Theory of the magnetic response in finite two-dimensional superconductors

机译：有限二维超导体磁响应理论

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We present a theory of magnetic response in finite-size two-dimensional superconductors with Rashba spin-orbit coupling. The interplay between the latter and an in-plane Zeeman field leads on the one hand to an out-ol-plane spin polarization which accumulates at the edges of the sample over the superconducting coherence length, and on the other hand, to circulating supercurrenls decaying away from the edge over a macroscopic scale. In a long finite stripe of width W, both the spin polarization and the currents contribute to the total magnetic moment induced at the stripe ends. These two contributions scale with powers of W such that for sufficiently large samples it can be detected by current magnetometry techniques.

机译：我们在具有Rashba旋转轨道耦合的有限尺寸二维超导体中呈现磁响应理论。后者与面内塞曼场之间的相互作用在一方面引导到外部平面旋转偏振，其在超导相干长度上累积在样品的边缘处，另一方面，循环超级循环衰减远离边缘在宏观尺度上。在长度有限的宽度W中，旋转极化和电流都有助于在条纹端部诱导的总磁矩。这两个贡献与W的功率相比，使得对于足够大的样品，可以通过电流磁力学技术来检测。

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《Physical review》 |2020年第6期|060506.1-060506.5|共5页
作者
F. Sebastian Bergeret; Ilya V. Tokutly;
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Centra de Fisica de Materiales (CFM-MPC) Centra Mixto CSIC-UPV/EHU Manuel de Eardizabal 5 E-20018 San Sebastian Spain Donostia International Physics Center (DIPC) Manuel de Lardizabal 4 E-20018 San Sebastian Spain;

Nano-Bio Spectroscopy group Departamento Fisica de Materiates Universidad del Pais Vasco Av. Tolosa 72 E-20018 San Sebastian Spain IKERBASQUE Basque Foundation for Science E-48011 Bilbao Spain Donostia International Physics Center (DIPC) Manuel de Lardizabal 4 E-20018 San Sebastian Spain;

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Theory of the magnetic response in finite two-dimensional superconductors

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