论文标题
超导性和局部反演对称性破坏
Superconductivity and Local Inversion-Symmetry Breaking
论文作者
论文摘要
反转和时间逆转是超导体中库珀对结构的必要对称性。一个或两者的丧失导致对这种结构的修改，并可以以深刻的方式改变超导阶段的特性。缺乏反转，非中心对称材料的超导性已成为一个重要的话题，尤其是在拓扑超导性以及异常的磁性和磁电特性的背景下。最近，具有局部但不全球反转对称性破坏的晶体结构引起了人们的注意，因为超导性可以在中心对称材料中表现出不天真期望的现象。在介绍了局部非中心晶体和不同物质实现的概念之后，我们讨论了这种局部对称性破坏分类的后果，预期的，部分，部分已经观察到了非常规超导性的现象学，以及可能的拓扑超导阶段。
Inversion and time reversal are essential symmetries for the structure of Cooper pairs in superconductors. The loss of one or both leads to modifications to this structure and can change the properties of the superconducting phases in profound ways. Lacking inversion, superconductivity in noncentrosymmetric materials has become an important topic, in particular, in the context of topological superconductivity as well as unusual magnetic and magneto-electric properties. Recently, crystal structures with local, but not global inversion-symmetry breaking have attracted attention, as superconductivity can exhibit phenomena not naively expected in centrosymmetric materials. After introducing the concept of locally noncentrosymmetric crystals and different material realizations, we discuss consequences of such local symmetry breaking on the classification, the expected and, in parts, already observed phenomenology of unconventional superconductivity, and possible topological superconducting phases.
