Effect of magnetism and phonons on localized carriers in the ferrimagnetic kagome metals GdMn$_6$Sn$_6$ and TbMn$_6$Sn$_6$
In: Phys. Rev. B 106, L241108 (2022); (2022)
Online
report
Zugriff:
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, $R$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 $R$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 - 18000 cm$^{-1}$, equivalent to 6.2 meV - 2.23 eV) 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.
Comment: 7 pages, 3 figures
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Effect of magnetism and phonons on localized carriers in the ferrimagnetic kagome metals GdMn$_6$Sn$_6$ and TbMn$_6$Sn$_6$
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Autor/in / Beteiligte Person: | Wenzel, M. ; Tsirlin, A. A. ; Iakutkina, O. ; Yin, Q. ; Lei, H. C. ; Dressel, M. ; Uykur, E. |
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Quelle: | Phys. Rev. B 106, L241108 (2022); (2022) |
Veröffentlichung: | 2022 |
Medientyp: | report |
DOI: | 10.1103/PhysRevB.106.L241108 |
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