CeRh $_2$ As $_2$的非对称对称性和场驱动奇宇称对
Non-symmorphic symmetry and field-driven odd-parity pairing in CeRh$_2$As$_2$
摘要：
最近，在CeRh $_2$ As $_2$中发现了场诱导偶宇称到奇宇称超导相变的证据[S. Khim等人，Science 373 1012（2021）]。在这里，我们认为，P4/nmm非对称晶体结构的CeRh $_2$作为$_2$起着关键作用，通过确保大的自旋轨道相互作用附近的布里渊区边界，这自然会导致所需的近简并性的偶数和奇数宇称通道，使这种转变。我们进一步评论我们的理论的相关性FeSe，在相同的结构结晶。
英文摘要：
Recently, evidence has emerged for a field-induced even- to odd-parity superconducting phase transition in CeRh$_2$As$_2$ [S. Khim et al., Science 373 1012 (2021)]. Here we argue that the P4/nmm non-symmorphic crystal structure of CeRh$_2$As$_2$ plays a key role in enabling this transition by ensuring large spin-orbit interactions near the Brillouin zone boundaries, which naturally leads to the required near-degeneracy of the even- and odd-parity channels. We further comment on the relevance of our theory to FeSe, which crystallizes in the same structure.
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