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arXiv 2202.12178cond-mat.supr-con
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复杂量子材料中的非幺正超导电性

Nonunitary Superconductivity in Complex Quantum Materials

Aline Ramires

摘要:

本文对复杂量子材料中的非幺正超导性进行了全面的讨论。首先简要回顾了非幺正超导的概念,我们讨论了它在简单模型中的光谱特征,其中只有自旋作为内部自由度。在具有多个内部自由度的复杂材料中,有更多的可能性来发展非幺正序参量。我们提供的例子集中在d-电子系统的两个轨道,适用于各种材料。我们讨论了超导谱的后果,强调在有限的能量带交叉的间隙开口可以归因于一个非幺正序参数,如果这是与一个有限的超导健身矩阵$\hat{F}_C(\mathbf{k})$。我们推测,复杂量子材料中的非幺正超导性实际上是非常常见的,并且可以与时间反演对称性破缺超导体的多个案例相关联。

英文摘要:

We present a comprehensive discussion on nonunitary superconductivity in complex quantum materials. Starting with a brief review of the notion of nonunitary superconductivity, we discuss its spectral signatures in simple models with only the spin as an internal degree of freedom. In complex materials with multiple internal degrees of freedom, there are many more possibilities for the development of nonunitary order parameters. We provide examples focusing on d-electron systems with two orbitals, applicable to a variety of materials. We discuss the consequences for the superconducting spectra, highlighting that gap openings of band crossings at finite energies can be attributed to a nonunitary order parameter if this is associated with a finite superconducting fitness matrix $\hat{F}_C(\mathbf{k})$. We speculate that nonunitary superconductivity in complex quantum materials is in fact very common and can be associated with multiple cases of time-reversal symmetry breaking superconductors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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