Effects of Rashba and Dresselhaus spin-orbit couplings on the critical temperature and paramagnetic limiting field of superconductors with broken inversion symmetry

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2024-02-29 DOI:10.1016/j.physc.2024.1354465

H. Yavari, M. Tayebantayeba

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引用次数: 0

Abstract

Transition temperature (T_c) and paramagnetic limiting of a superconductor without spatial inversion symmetry in the presence of both Rashba and Dresselhaus antisymmetric spin-orbit couplings is studied. The critical temperature is derived for anisotropy of the superconducting order parameter, ranging from isotropic s-wave to any pairing state with nonzero angular momentum and mixed parity singlet-triplet states emerge due to spin-orbit coupling (SOC). It will be shown that for unprotected odd parity pairing, pure Rashba and Dresselhaus SOCs have similar effects on the reduction of T_c and for combined effects of the two spin-orbit couplings at fixed SOC, T_c reduced by increasing Dresselhaus component and decreased down to its minimum value in the equal-Rashba-Dresselhaus case. The paramagnetic limiting is also analyzed for spin-singlet pairing and it is shown that the low temperature divergence behavior of paramagnetic limiting is less affected by both Rashba and Dresselhaus SOCs but for fixed SOC strength by increasing Dresselhaus component the paramagnetic limiting field is increased.

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拉什巴和德雷斯豪斯自旋轨道耦合对具有破碎反转对称性的超导体的临界温度和顺磁极限场的影响

研究了存在拉什巴和德雷斯豪斯反不对称自旋轨道耦合的无空间反转对称超导体的过渡温度（Tc）和顺磁极限。研究得出了超导阶参数各向异性的临界温度，其范围从各向同性的 s 波到任何具有非零角动量的配对态，以及由于自旋轨道耦合（SOC）而出现的混合奇偶性单三态。研究表明，对于无保护的奇奇偶校验配对，纯拉什巴自旋轨道耦合和德雷斯豪斯自旋轨道耦合对降低 Tc 的影响相似，而对于固定自旋轨道耦合下两种自旋轨道耦合的综合影响，Tc 会随着德雷斯豪斯分量的增加而降低，并在拉什巴-德雷斯豪斯分量相等的情况下降至最小值。我们还分析了小自旋配对的顺磁极限，结果表明顺磁极限的低温发散行为受拉什巴和德雷斯豪斯 SOC 的影响较小，但在 SOC 强度固定的情况下，增加德雷斯豪斯分量会增加顺磁极限场。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.