论文标题
Majorana Multiple响应：一般理论和对墙纸组的应用
Majorana multipole response: General theory and application to wallpaper groups
论文作者
论文摘要
库珀对对称性的识别是研究非常规超导体的第一步，但由于其自身的困难，到目前为止仅建立了少数几步。为了解决这个问题，我们开发了使用拓扑超导性知识来识别对称对称性的理论。在时间反向不变的拓扑超导体中建立了新兴的主要植物效率理论，我们发现Majorana Fermions和Cooper Pair对称性的电磁响应之间的一对一对应关系。新兴的主要植物会构成磁性结构，这些结构在晶体对称性下与Cooper对共享相同的不可约形表示。我们此外，还表明，高自旋或非型超导体中的主要纳拉菌可能会表现出磁性八极反应，从而直接证明了这些异国情调的超导状态。还阐明了多个Majorana Kramers对的电响应。我们的理论提供了通过表面旋转敏感的测量值鉴定非常规库珀配对的基本原理，以及通过外部电磁场操纵Majorana fermions的基础。
Whereas identification of Cooper pair symmetry is the first and crucial step in the investigation of unconventional superconductors, only a few have been established so far because of its own difficulties. To solve this problem, we develop a theory for identification of pairing symmetry using knowledge of topological superconductivity. Establishing the multipole theory of emergent Majorana fermions in time-reversal-invariant topological superconductors, we discover a one-to-one correspondence between the electromagnetic response of Majorana fermions and Cooper pair symmetry. The emergent Majorana fermions host magnetic structures that share the same irreducible representation with Cooper pairs under crystalline symmetry. We furthermore reveal that Majorana fermions in high-spin or nonsymmorphic superconductors may exhibit magnetic octupole responses, which give a direct evidence of these exotic superconducting states. Electric responses of multiple Majorana Kramers pairs are also clarified. Our theory provides the fundamentals for identification of unconventional Cooper pairings through surface-spin-sensitive measurements as well as that for manipulation of Majorana fermions by external electromagnetic fields.
