论文标题
$ t_ \ mathrm {cdw} $高于$ t_ \ mathrm {cdw} $的充电波动，由玻璃般的热运输在kagome金属中$ a $ a $ _3 $ _3 $ sb $ _5 $（$ a $ = k，rb，cs）
Charge fluctuations above $T_\mathrm{CDW}$ revealed by glasslike thermal transport in kagome metals $A$V$_3$Sb$_5$ ($A$ = K, Rb, Cs)
论文作者
论文摘要
我们提出了kagome金属的热容量，电气和热传输测量$ a $ v $ _3 $ sb $ _5 $（$ a $ = k，rb，cs）。在所有三种化合物中，在电荷密度波（CDW）过渡温度上方的短距电荷波动的发展$ t_ \ mathrm {cdw} $通过电子量子耦合强烈散射声子，从而导致玻璃状的声子热传输，即，在冷却后，Phonon热电导率降低了。一旦$ t_ \ mathrm {cdw} $设置的远程充电顺序将淬灭，而短距离电荷波动被淬灭，并恢复了典型的UMKLAPP散射占主导地位的声子加热传输。电荷 - 触发诱导的玻璃状声子导热率意味着$ a $ v $ _3 $ _3 $ sb $ _5 $中的相当大的电子 - 音波耦合。
We present heat capacity, electrical and thermal transport measurements of kagome metals $A$V$_3$Sb$_5$ ($A$ = K, Rb, Cs). In all three compounds, development of short-range charge fluctuations above the charge density wave (CDW) transition temperature $T_\mathrm{CDW}$ strongly scatters phonons via electron-phonon coupling, leading to glasslike phonon heat transport, i.e., phonon thermal conductivity decreases weakly upon cooling. Once the long-range charge order sets in below $T_\mathrm{CDW}$, short-range charge fluctuations are quenched, and the typical Umklapp scattering dominated phonon heat transport is recovered. The charge-fluctuations-induced glasslike phonon thermal conductivity implies sizable electron-phonon coupling in $A$V$_3$Sb$_5$.
