论文标题
磁性和声子对铁磁kagome金属GDMN $ _6 $ sn $ _6 $ and tbmn $ _6 $ sn $ _6 $的磁性和声子对本地化运营商的效果
Effect of magnetism and phonons on localized carriers in the ferrimagnetic kagome metals GdMn$_6$Sn$_6$ and TbMn$_6$Sn$_6$
论文作者
论文摘要
kagome金属具有特殊的光谱，该光谱由drude型响应中的自由载流子的贡献，局部载体，被视为强度依赖温度依赖性定位峰，在某些情况下，声子显示出强烈的异常。稀有地球金属系列，$ r $ mn $ _6 $ sn $ _6 $，提供了一个奇妙的游乐场，可以在存在可变磁性顺序的情况下研究Kagome Metals的电子特性。在这里，我们报告了$ r $ mn $ _6 $ _6 $ _6 $ family，gdmn $ _6 $ _6 $ sn $ _6 $（平面费用ferrimagnet）和tbmn $ _6 $ _6 $ _6 $ sn $ _6 $ _6 $（$ _6 $）的两名成员，$ r $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $ _6 $（$ _6 $） 6.2 meV -2.23 eV）降至10 k。在高温下，观察到一个大约160 cm $^{ - 1} $的声子模式，在TBMN $ _6 $ _6 $ _6 $ _6 $下方将筛选出$ \ $ \ sim $ 150 k，作为通过该模式线性通过的本地化峰值。在GDMN $ _6 $ sn $ _6 $中，声子的失踪伴随着峰位置的饱和开始，这表明这两个功能之间存在异常的相互作用。
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.
