This paper presents a method to detect time-reversal symmetry breaking in noncentrosymmetric superconductors using only transport measurements. Specifically, if time-reversal symmetry is broken via a phase difference between singlet and triplet correlations, as in anapole superconductors, the differential conductance in superconductor-ferromagnet-normal metal junctions is enhanced by increasing the exchange field strength in the ferromagnet. This is in sharp contrast with the negative magnetoresistance when using superconductors in which time-reversal symmetry is preserved. Moreover, results show a large quadrupolar component of the magnetoresistance which is qualitatively different from the bipolar giant magnetoresistance in strong ferromagnets.

中文翻译：

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变极超导结中的正磁阻

本文提出了一种仅使用输运测量来检测非中心对称超导体中时间反转对称性破缺的方法。具体来说，如果时间反转对称性通过单重态和三重态相关性之间的相位差被打破，如在变极超导体中，则超导体-铁磁体-普通金属结中的微分电导通过增加铁磁体中的交换场强度而增强。这与使用保持时间反转对称性的超导体时的负磁阻形成鲜明对比。此外，结果表明磁阻有很大的四极分量，这与强铁磁体中的双极巨磁阻有本质上的不同。