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- W4289596326 abstract "Kagome metals possess peculiar optical spectra consisting of contributions from free charge carriers in a Drude-type response, localized carriers seen as a strongly temperature-dependent localization peak, and, in some cases, phonons displaying strong anomalies. The rare-earth kagome metal series, $Re$Mn$_6$Sn$_6$, provides a marvelous playground to study the electronic properties of kagome metals in the presence of variable magnetic order. Here, we report temperature-dependent reflectivity studies on two members of the $Re$Mn$_6$Sn$_6$ family, GdMn$_6$Sn$_6$ (in-plane ferrimagnet) and TbMn$_6$Sn$_6$ (out-of-plane ferrimagnet), in a broad energy range (50 cm$^{-1}$ - 18000 cm$^{-1}$, equivalent to 6 meV - 2.25 meV) down to 10 K. At high temperatures, a phonon mode at approximately 160 cm$^{-1}$ is observed, which becomes screened out in TbMn$_6$Sn$_6$ below $sim$ 150 K as the localization peak linearly passes through the mode. In GdMn$_6$Sn$_6$, the disappearance of the phonon is accompanied by the onset of saturation of the peak position, suggesting an unusual interplay between the two features. Lastly, our calculations reveal the strongly correlated nature of $Re$Mn$_6$Sn$_6$ compounds and hence, significant deviations from the simple band picture." @default.
- W4289596326 created "2022-08-03" @default.
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- W4289596326 date "2022-08-01" @default.
- W4289596326 modified "2023-09-24" @default.
- W4289596326 title "Effect of magnetism and phonons on localized carriers in ferrimagnetic kagome metals GdMn$_6$Sn$_6$ and TbMn$_6$Sn$_6$" @default.
- W4289596326 doi "https://doi.org/10.48550/arxiv.2208.00756" @default.
- W4289596326 hasPublicationYear "2022" @default.
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