针状阿布里科索夫漩涡的电子结构:准粒子边界态的安德烈耶夫理论

IF 1.1 3区 物理与天体物理 Q4 PHYSICS, APPLIED Journal of Low Temperature Physics Pub Date : 2024-05-28 DOI:10.1007/s10909-024-03155-5
A. S. Mel’nikov, A. V. Samokhvalov
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引用次数: 0

摘要

从具有任意各向异性费米面的超导体的波格鲁波夫-德-吉尼方程出发,我们推导出了安德烈耶夫型理论,其中考虑到了类粒子轨迹干涉和相应的非准经典量子化效应。由此得出的安德列夫方程被用于分析定位在针状涡核上的亚隙准粒子态。结果表明,电子和空穴在缺陷处的正常反射会导致亚隙光谱的质变,并形成新型的束缚准粒子态。我们重点研究了费米表面各向异性对准粒子光谱特性的影响,包括光谱中软性和硬性小间隙的打开以及针状涡核周围局部态密度的空间行为。
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Electronic Structure of Pinned Abrikosov Vortices: Andreev Theory of Quasiparticle Bound States

Starting from the Bogolubov–de Gennes equations for superconductor with an arbitrary anisotropic Fermi surface we derive the Andreev-type theory accounting for the quasiparticle trajectory interference and corresponding nonquasiclassical quantization effects. The resulting Andreev equations are applied for the analysis of the subgap quasiparticle states localized at the pinned vortex cores. The normal reflection of electrons and holes at the defects is shown to result in the qualitative transformation of the subgap spectra and formation of new types of bound quasiparticle states. We focus on the effect of the Fermi surface anisotropy on the quasiparticle spectral properties including opening of soft and hard minigaps in the spectrum and spatial behavior of the local density of states around pinned vortex cores.

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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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