Sr$_2$RuO$_4$中可能的三维向列型奇宇称配对:实验证据与预言
超导电性
2019-05-09 v3 强关联电子
摘要
由于存在非平庸的三维自旋-轨道纠缠,SrRuO可能是一种时间反演不变的向列型波超导体,具有共面的面内与面外配对分量。本文讨论当面外配对分量占主导时该态的各种特征。首先,面内单轴应变下超导的提升几乎是应变的二次函数,这是因为面外配对缺乏与应变的线性阶耦合。其次,当应变沿某一面内方向施加时,该向列型波配对在降温过程中仅表现出单一相变。这些结果与最近的若干单轴应变测量一致,而若按手性波序则难以解释。我们进一步表明,可通过超导起始时某些声波的速度跳变来区分向列型波态与手性波态。文中还讨论了在应变下SR实验以及NMR Knight位移测量的可能启示。
引用
@article{arxiv.1901.07041,
title = {Possible 3D nematic odd-parity pairing in Sr$_2$RuO$_4$: experimental evidences and predictions},
author = {Wen Huang and Yi Zhou and Hong Yao},
journal= {arXiv preprint arXiv:1901.07041},
year = {2019}
}
备注
8 pages including Supplementary. Added discussions about split transitions and nematic domain formation under stain, as well as possible implications for $\mu$SR experiment under strain and NMR Knight shift measurement