非相对论性p波磁体中的伊辛超导性
Nonrelativistic-Ising superconductivity in p-wave magnets
AI总结：
研究发现p波磁体中仅支持伊辛超导性，其独特的自旋分裂和非共线磁化导致Cooper对为单态与三态50:50混合，不同于常规反铁磁体和alt磁体。
摘要：
我们讨论了在p波磁体中出现超导性的一种可能性。这些是最近发现的材料，其净磁化为零，由对称性决定，同时具有有限的非相对论性自旋分裂电子能带，类似于alt磁体。同样，自旋极化在动量空间中是共线的。然而，与alt磁体不同，磁化在实空间中是非共线的，而自旋分裂在动量空间中遵循时间反演对称性。因此，如果此类材料存在超导性（由于声子或其他机制），唯一支持的超导对称性是伊辛超导性，即任何Cooper对都是单态和三态50:50的混合。这种不寻常的行为也与常规反铁磁体形成鲜明对比，后者可以支持任何奇偶性的Cooper对，而alt磁体只能支持非单位三态对。大三态成分和增强的抗对破坏性是p波磁体的固有特性，因此是非传统的，因为它们不体现在常规自旋轨道耦合诱导的伊辛超导体中。
英文摘要：
We discuss a possibility of superconductivity in the p-wave magnets. These are recently discovered materials that have zero net magnetization by symmetry and finite non-relativistic spin splitting of electron bands, like in altermagnets. Similarly, the spin polarizations is collinear in the momentum space. Yet, as opposed to altermagnets, the magnetization is noncollinear in the real space, and the spin splitting obeys time-reversal symmetry in the momentum space. As a result, if such material harbors superconductivity (due to phonons, or any other mechanism), the only supported superconducting symmetry is Ising superconductivity, an exotic symmetry where any Cooper pair is a 50:50 mix of singlet and triplet. This unusual behavior is also in stark contrast to regular antiferromagnet, which can support Cooper pairs of any parity, and altermagnets, which can only support nonunitary triplet pairs. The presence of large triplet component and enhanced resilience against pair breaking is inherent to the p-wave magnets and as such is unconventional as it does not materialize in conventional spin-orbit coupling induced Ising superconductors.
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