Magnetism driven by strong electronic correlations in the heavily carrier-doped iron oxypnictide LaFeAsO0.49H0.51
Magnetism driven by strong electronic correlations in the heavily carrier-doped iron oxypnictide LaFeAsO0.49H0.51
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重载流子掺杂铁氮氧化物 LaFeAsO0.49H0.51 中强电子相关性驱动的磁性
DOI：
10.1103/physrevb.101.174414
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发表时间：
2020
影响因子：
3.7
通讯作者：
Hosono H.
中科院分区：
文献类型：
--
作者：
Hiraishi M.;Kojima K. M.;Okabe H.;Takeshita S.;Koda A.;Kadono R.;Khasanov R.;Iimura S.;Matsuishi S.;Hosono H.
在2.6GPa的静水压下，用μ子自旋转动测量研究了铁基超导体中第二反铁磁相（AF_2）的磁性。与原始反铁磁相（AF 1;.此外，虽然AF 1相总是伴随着结构转变（从四方晶系到正交晶系）在温度略高于，AF 2相占主导地位，在较高的压力，GPa以上，其中的结构转变被抑制。这些特征表明AF 2相的微观起源与AF 1相不同，表明电子相关在前者中起着重要作用。我们认为，轨道选择性莫特转变是一个合理的方案来解释所观察到的压力依赖性的和在AF 2阶段。
The magnetism of the second antiferromagnetic phase (AF2) arising in the iron-basedsuperconductor forwas investigated by muon spin rotation measurements under hydrostatic pressure up to 2.6 GPa. The Néel temperatureobtained for a sample withexhibits considerably greater sensitivity to pressure than that in the pristine antiferromagnetic phase (AF1;. Moreover, while the AF1 phase is always accompanied by the structural transition (from tetragonal to orthorhombic) at a temperaturewhich is slightly higher than, the AF2 phase prevails at higher pressures, aboveGPa, where the structural transition is suppressed. These features indicate that the microscopic origin of the AF2 phase is distinct from that of AF1, suggesting that electronic correlation plays an important role in the former phase. We argue that the orbital-selective Mott transition is a plausible scenario to account for the observed pressure dependence ofandin the AF2 phase.