超导FeS的自旋激发与费米面
超导电性
2017-03-20 v1
摘要
高温超导出现在反铁磁不稳定性和向列态附近。关于FeSe中向列序的起源及其与超导的关系仍存在争论。在此，我们利用输运、中子散射和费米面测量证明，水热生长的超导FeS（FeSe的同结构物）是一种无向列序的四方顺磁体，其准粒子质量较FeSe显著降低。仅观察到高达100 meV的条纹型自旋激发。未发现FeS中自旋激发与超导之间的直接耦合，这表明FeS的关联性较弱，而FeSe中的向列序源于棋盘状与条纹状自旋涨落的竞争。
引用
@article{arxiv.1702.02712,
title = {Spin excitations and the Fermi surface of superconducting FeS},
author = {Haoran Man and Jiangang Guo and Rui Zhang and Rico U. Schonemann and Zhiping Yin and Mingxuan Fu and M. B. Stone and Qingzhen Huang and Yu Song and Weiyi Wang and David Singh and Felix Lochner and Tillman Hickel and Ilya Eremin and Leland Harriger and Jeffrey W. Lynn and Collin Broholm and Luis Balicas and Qimiao Si and Pengcheng Dai},
journal= {arXiv preprint arXiv:1702.02712},
year = {2017}
}
备注
11 pages, 4 pages