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- W4308341930 abstract "Both cuprates and iron-based superconductors demonstrate nematicity, defined as the spontaneous breaking of rotational symmetry in electron systems. The nematic state can play a role in the high-transition-temperature superconductivity of these compounds. However, the microscopic mechanism responsible for the transport anisotropy in iron-based compounds remains debatable. Here, we investigate the electronic anisotropy of CaFeAsF by measuring its interlayer resistivity under magnetic fields with varying field directions. Counterintuitively, the interlayer resistivity was larger in the longitudinal configuration ($B parallel I parallel c$) than in the transverse one ($B perp I parallel c$). The interlayer resistivity exhibited a so-called coherence peak under in-plane fields and was highly anisotropic with respect to the in-plane field direction. At $T$ = 4 K and $B$ = 14 T, the magnetoresistance $Deltarho/rho_0$ was seven times larger in the $B parallel b_o$ than in the $B parallel a_o$ configuration. Our theoretical calculations of the conductivity based on the first-principles electronic band structure qualitatively reproduced the above observations but underestimated the magnitudes of the observed features. The proposed methodology can be a powerful tool for probing the nematic electronic state in various materials." @default.
- W4308341930 created "2022-11-11" @default.
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- W4308341930 date "2022-11-04" @default.
- W4308341930 modified "2023-10-18" @default.
- W4308341930 title "In-plane electronic anisotropy revealed by interlayer resistivity measurements on the iron-based superconductor parent compound CaFeAsF" @default.
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- W4308341930 doi "https://doi.org/10.1103/physrevb.106.184503" @default.
- W4308341930 hasPublicationYear "2022" @default.
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