量子电子玻璃中的弛豫动力学
Relaxation dynamics in quantum electron-glasses
摘要：
实验表明，电子玻璃的动力学随体系$n$的载流子浓度的变化要么是\textit{slows down }随温度的升高，要么是\textit{independent}随温度的升高，这也与典型的弛豫时间（或“粘度”）对$n$的依赖性有关。这些相关的功能被认为是一致的耗散隧穿模型。电子玻璃的缓慢弛豫可能是多体量子系统中摩擦的表现。我们的考虑还可以解释为什么强局域化的颗粒金属可能会表现出电子玻璃效应，而半导体则不会。
英文摘要：
It is experimentally shown that, depending on the carrier-concentration of the system $n$, the dynamics of electron-glasses either \textit{slows down }with increasing temperature or it is \textit{independent} of it. This also correlates with the dependence of a typical relaxation time (or `viscosity') on $n$. These linked features are argued to be consistent with a model for dissipative tunneling. The slow relaxation of the electron glass may emerge then as a manifestation of friction in a many-body quantum system. Our considerations may also explain why strongly-localized granular metals are likely to show electron-glass effects while semiconductors are not.
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