电子玻璃的光激发
Optical excitation of Electron-Glasses
摘要：
电子玻璃可以很容易地通过各种手段驱动远离平衡。综述了几种激发体系的机制及其优缺点。在本研究中，我们着重于通过与近红外辐射的相互作用来激发电子玻璃的过程。该协议的效率在不同的电子玻璃之间差异很大，但它仅微弱地取决于它们在液氦温度下的电阻。一个显着的增强的激发效率观察掺杂晶体氧化铟与金。在掺杂Pb的样品中也观察到一些增强，但这种增强随着时间的推移而消失，这与Au掺杂样品中的情况不同。几种结构和分析工具用于表征可能导致这些影响的材料变化。高频电磁场采取系统远离平衡的可能途径进行了讨论。
英文摘要：
Electron-glasses can be readily driven far from equilibrium by a variety of means. Several mechanisms to excite the system and their relative merits are reviewed. In this study we focus on the process of exciting electron-glasses by interaction with near infrared radiation. The efficiency of this protocol varies considerably among different electron-glasses, but it only weakly depends on their resistance at liquid helium temperatures. A dramatic enhancement of the excitation efficiency is observed upon doping crystalline indium-oxide with Au. Some enhancement is observed also in samples doped with Pb but this enhancement fades away with time unlike the situation in the Au-doped samples. Several structural and analytical tools are used to characterize the changes in the materials that may be responsible for these effects. Possible routes by which high-frequency electromagnetic fields take the system far from equilibrium are discussed.
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