FeSe 中由轨道选择性自旋涨落导致的向列配对
超导电性
2018-11-09 v3
摘要
FeSe 是一种引人关注的铁基超导体。它呈现出无磁性的反常向列态，并且可通过调控提高超导临界温度。近来观测到超导能隙的显著各向异性。其解释与向列转变本身的理解密切相关。本文表明，由轨道选择性自旋涨落驱动的 spin-nematic 图景为理解这两种现象提供了一个简单方案。由各向异性自旋模介导的配对不仅是轨道选择性的，也是向列性的，导致空穴口袋与 电子口袋之间更强的配对散射。轨道序与向列配对之间的微妙平衡也指向空穴能隙各向异性明显的 依赖关系。
引用
@article{arxiv.1804.05800,
title = {Nematic Pairing from Orbital Selective Spin Fluctuations in FeSe},
author = {L. Benfatto and B. Valenzuela and L. Fanfarillo},
journal= {arXiv preprint arXiv:1804.05800},
year = {2018}
}
备注
Main text: 6 pages + 5 figure + Supplementary Material. We added new numerical results obtained adding a pairing xy channel. We showed results for the Y electron pocket. We revised the discussion section in order to give a more balanced account of the differences with previous other works