单带和双带超导异质结构中的邻近效应:随时间变化的金兹堡-朗道方法

IF 1.1 3区 物理与天体物理 Q4 PHYSICS, APPLIED Journal of Low Temperature Physics Pub Date : 2024-08-29 DOI:10.1007/s10909-024-03197-9
C. A. Aguirre, Julián Faúndez, P. Díaz, D. Laroze, J. Barba-Ortega
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引用次数: 0

摘要

在这项工作中,我们研究了单带和双带超导三维异质结构中的邻近效应,该异质结构由两个冷凝体(冷凝体 1 和冷凝体 2)描述,存在垂直于异质结构的外磁场。两个凝聚体界面之间的距离由参数 \(\lambda '\) 给出。考虑到约瑟夫森耦合,我们求解了与时间相关的金兹堡-朗道方程,以探索磁化、吉布斯自由能和阿布里科索夫涡旋态等特性。我们提出了三种情况:情况 1,两个冷凝物都由单带组成;情况 2,冷凝物由双带组成;情况 3,冷凝物 1 具有单带,冷凝物 2 具有双带。因此,我们强调了第一临界磁场的变化以及超导凝聚态之间的邻近效应诱发的新颖涡旋构型。这种现象极大地影响了每个超导带中涡旋的排列。
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Proximity Effects in Single- and Two-Band Superconducting Heterostructures: A Time-Dependent Ginzburg-Landau Approach

In this work, we study the proximity effects in a single- and two-band superconducting three-dimensional heterostructure, described by two condensates (condensate 1 and condensate 2) in the presence of an external magnetic field perpendicular to the heterostructure. The distance between the interfaces of both condensates is given by the parameter \(\lambda '\). We solve the time-dependent Ginzburg-Landau equations considering a Josephson-like coupling to explore properties such as magnetization, Gibbs free energy, and the Abrikosov vortex state. We propose three cases: case 1, both condensates are composed of a single-band; case 2, the condensates are composed of two bands; and case 3, condensate 1 has a single-band and condensate 2 has two bands. As a result, we highlight the variation of the first critical field and the novel vortex configurations induced by the proximity effect between the superconducting condensates. This phenomenon substantially influences the arrangement of vortices in each of the superconducting bands.

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来源期刊
Journal of Low Temperature Physics
Journal of Low Temperature Physics 物理-物理:凝聚态物理
CiteScore
3.30
自引率
25.00%
发文量
245
审稿时长
1 months
期刊介绍: The Journal of Low Temperature Physics publishes original papers and review articles on all areas of low temperature physics and cryogenics, including theoretical and experimental contributions. Subject areas include: Quantum solids, liquids and gases; Superfluidity; Superconductivity; Condensed matter physics; Experimental techniques; The Journal encourages the submission of Rapid Communications and Special Issues.
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