论文标题
在有限温度下无定形固体中低频状态的通用密度
Universal Density of Low Frequency States in Amorphous Solids at Finite Temperatures
论文作者
论文摘要
已经确定，零温度下的无定形固体的低频准定位模式表现出状态的通用密度，具体取决于频率为$ d（ω）\ simω^4 $。该普遍法律是否扩展到有限的温度仍然是一个悬而未决的问题。在这封信中，我们表明，温度高达$ t_g/3 $的模型玻璃具有相同的通用状态密度。唯一的条件是{\ em平均}粒子位置在热扩散之前稳定稳定，破坏了材料的笼子结构。准定位的低频模式的通用密度是指材料热平均构型周围的振动。
It has been established that the low frequency quasi-localized modes of amorphous solids at zero temperature exhibit universal density of states, depending on the frequencies as $D(ω) \sim ω^4$. It remains an open question whether this universal law extends to finite temperatures. In this Letter we show that well quenched model glasses at temperatures as high as $T_g/3$ possess the same universal density of states. The only condition required is that {\em average} particle positions stabilize before thermal diffusion destroys the cage structure of the material. The universal density of quasi-localized low frequency modes refers then to vibrations around the thermally averaged configuration of the material.
