Magnetic-Field-Induced Spin Nematicity in FeSe1-xSx and FeSe1-yTey Superconductor Systems

• 作者: Shaobo Liu Jie Yuan Sheng Ma Zouyouwei Lu Yuhang Zhang Mingwei Ma Hua Zhang Kui Jin Li Yu Fang Zhou Xiaoli Dong Zhongxian Zhao
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: CONDENSED MATTER:ELECTRONIC STRUCTURE,ELECTRICAL,MAGNETIC,AND OPTICAL PROPERTIES
• 页码范围: 132-143
• 页数: 12页
• 语种: 英文
• DOI: 10.1088/0256-307X/38/8/087401

摘要

The angular-dependent magnetoresistance(AMR)of the ab plane is measured on the single crystals of iron-chalcogenide FeSe1-xSx(x=0,0.07,0.13 and 1)and FeSe1-yTey(y=0.06,0.61 and 1)at various temperatures under fields up to 9T.A pronounced twofold-anisotropic carrier-scattering effect is identified by AMR,and attributed to a magnetic-field-induced spin nematicity that emerges from the tetragonal normal-state regime below a characteristic temperature Tsn.This magnetically polarized spin nematicity is found to be ubiquitous in the isoelectronic FeSe1-xSx and FeSe1-yTey systems,no matter whether the sample shows an electronic nematic order at Ts≤Tsn,or an antiferromagnetic order at TN＜Tsn,or neither order.Importantly,we find that the induced spin nematicity shows a very different response to sulfur substitution from the spontaneous electronic nematicity:The spin-nematic Tsn is not suppressed but even enhanced by the substitution,whereas the electronic-nematic Ts is rapidly suppressed,in the FeSe1-xSx system.Furthermore,we find that the superconductivity is significantly suppressed with the enhancement of the induced spin nematicity in both FeSe1-xSx and FeSe1-yTey samples.