Magnetic edge fields in UTe$_2$ near zero background fields

Yusuke Iguchi, Huiyuan Man, S. M. Thomas, Filip Ronning, Jun Ishizuka, Manfred Sigrist, Priscila F. S. Rosa, Kathryn A. Moler
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Abstract

Chiral superconductors are theorized to exhibit spontaneous edge currents. Here, we found magnetic fields at the edges of UTe$_2$, a candidate odd-parity chiral superconductor, that seem to agree with predictions for a chiral order parameter. However, we did not detect the chiral domains that would be expected, and recent polar Kerr and muon spin relaxation data in nominally clean samples argue against chiral superconductivity. Our results show that hidden sources of magnetism must be carefully ruled out when using spontaneous edge currents to identify chiral superconductivity.
零背景场附近 UTe$_2$ 中的磁边缘场
这里,我们在候选奇偶手性超导体 UTe$_2$ 的边缘发现了磁场,这似乎与手性阶参数的预测一致。然而,我们并没有检测到预期的手性域,而且最近在名义上干净的样品中获得的极地克尔和μ介子自旋弛豫数据也否定了手性超导。我们的研究结果表明,在利用自发边电流识别手性超导时,必须小心排除隐藏的磁性来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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