交替磁超导体中的反常超流体响应
Anomalous Superfluid Response in Altermagnetic Superconductors
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中文总结 AI 辅助
该研究发现交替磁超导体在任意杂质浓度下存在反常顺磁超流体响应，其效应强度与磁场取向、样品纯净度相关，微波超流体刚度测量可灵敏探测无隙超导性。
中文摘要 AI 辅助
我们报道了在任意杂质浓度下，交替磁超导体中出现的反常（顺磁性）超流体响应。由于各向同性无隙超导性，具有面外塞曼场的交替磁超导体表现出各向同性顺磁迈斯纳效应。当交替磁交换场矢量与塞曼交换场矢量平行且样品纯净时，该效应最强；非磁性杂质的存在会使效应各向同性化，从而削弱该效应，但顺磁响应仍能在系统中等量杂质下维持。如近期实验所示，微波超流体刚度测量可作为无隙超导性的灵敏探针。
英文摘要
We report on the emergence of the anomalous (paramagnetic) superfluid response in altermagnetic superconductors at arbitrary impurity concentrations. Due to anisotropic gapless superconductivity, altermagnetic superconductors with an out-of-plane Zeeman field display an anisotropic paramagnetic Meissner effect. The effect is strongest for parallel altermagnetic and Zeeman exchange field vectors and in the clean sample. The presence of nonmagnetic impurities leads to isotropisation and, consequently, weakens the effect; however, the paramagnetic response sustains intermediate amounts of impurities in the system. As demonstrated in recent experiments, microwave superfluid stiffness measurements can serve as a sensitive probe of gapless superconductivity.
发表机构
- Universität Konstanz（康斯坦茨大学）
- Universität Greifswald（格赖夫斯瓦尔德大学）
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