论文标题
复杂的量子材料中的单身超导性
Nonunitary Superconductivity in Complex Quantum Materials
论文作者
论文摘要
我们提出了关于复杂量子材料中非单身超导性的全面讨论。从简要审查了非单身超导性的概念开始，我们在简单模型中讨论了它的光谱特征，仅旋转是内部自由度。在具有多个内部自由度的复杂材料中，开发非整体订单参数还有更多可能性。我们提供的示例专注于具有两个轨道的D电子系统，适用于各种材料。我们讨论了超导光谱的后果，强调如果有限能量的频带交叉点的间隙开口可以归因于无单位的订单参数，如果这与有限的超导能力矩阵矩阵$ \ hat {f} _c（f} _c（\ mathbf {k}））$。我们推测，复杂量子材料中的非单身超导性实际上很普遍，并且可以与多种时间反转对称性断裂超导体相关。
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.
