@article{8e598157ea154463871a95334c1b81c4,
title = "Magnetism driven by strong electronic correlations in the heavily carrier-doped iron oxypnictide LaFeAsO0.49 H0.51",
abstract = "The magnetism of the second antiferromagnetic phase (AF2) arising in the iron-based LaFeAsO1-xHx superconductor for x≳0.4 was investigated by muon spin rotation measurements under hydrostatic pressure up to 2.6 GPa. The N{\'e}el temperature (TN) obtained for a sample with x=0.51 exhibits considerably greater sensitivity to pressure than that in the pristine antiferromagnetic phase (AF1; x≲0.06). Moreover, while the AF1 phase is always accompanied by the structural transition (from tetragonal to orthorhombic) at a temperature (Ts) which is slightly higher than TN, the AF2 phase prevails at higher pressures, above ∼1.5 GPa, where the structural transition is suppressed (Ts=0). 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 of TN and Ts in the AF2 phase.",
author = "M. Hiraishi and Kojima, {K. M.} and H. Okabe and S. Takeshita and A. Koda and R. Kadono and R. Khasanov and S. Iimura and S. Matsuishi and H. Hosono",
note = "Funding Information: This work was supported by the MEXT Elements Strategy Initiative to Form Core Research Centers (Grant No. JPMXP0112101001). The μSR measurements were carried out at the Paul Scherrer Institute (PSI), Switzerland, under a user program (Proposal No. 20152061). We would like to thank the staff of the PSI for their technical support during experiments. Funding Information: This work was supported by the MEXT Elements Strategy Initiative to Form Core Research Centers (Grant No. JPMXP0112101001). The measurements were carried out at the Paul Scherrer Institute (PSI), Switzerland, under a user program (Proposal No. 20152061). We would like to thank the staff of the PSI for their technical support during experiments. Publisher Copyright: {\textcopyright} 2020 American Physical Society. {\textcopyright}2020 American Physical Society.",
year = "2020",
month = may,
day = "1",
doi = "10.1103/PhysRevB.101.174414",
language = "English",
volume = "101",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "17",
}