论文标题
相互作用引起的无序玻璃空间相关性
Interaction induced spatial correlations in a Disordered Glass
论文作者
论文摘要
该疾病和库仑相互作用竞争的结果是在几个安德森建筑器中观察到的电子玻璃相。这些系统中的疾病（通常是退化半导体）比相互作用强，因此系统的载体浓度n越高。在这里，我们报告了一个在in_ {x} o的电子玻璃相中观察到的新功能，并研究了最低的n。在先前研究的Anderson-undulators中尚未确认，该功能尚未确认为现场效应测量的广泛峰值。与现象相关的几个经验事实与反映相关电荷分布的猜想是一致的。特别是，该功能可以通过栅极电压操纵打开和关闭，这表明电荷分组的相关性。这也可能被两者抑制；温度，非欧味场或暴露于红外照明。洗涤后，当系统被允许放松足够长的时间时，该功能会重新出现。当载流子浓度增加以上时，出现的令人困惑的方面显然没有现象。这让人联想到玻璃转变难题，只是温度在后者中的作用是由疾病发挥的。对这些发现的分析突出了几个问题，这些问题挑战了我们对安德森绝缘子中混乱相互作用的理解。
A consequence of the disorder and Coulomb interaction competition is the electron-glass phase observed in several Anderson-insulators. The disorder in these systems, typically degenerate semiconductors, is stronger than the interaction, more so the higher is the carrier-concentration N of the system. Here we report on a new feature observed in the electron-glass phase of In_{x}O with the lowest N yet studied. The feature, resolved as a broad peak in field-effect measurements, has not been recognized in previously studied Anderson-insulators. Several empirical facts associated with the phenomenon are consistent with the conjecture that it reflects a correlated charge-distribution. In particular, the feature may be turned on and off by gate-voltage maneuvering, suggesting the relevance of charge-arrangements. It may also be suppressed by either; temperature, non-ohmic field, or exposure to infrared illumination. After being washed-out, the feature reappears when the system is allowed to relax for sufficiently long time. A puzzling aspect that arises is the apparent absence of the phenomenon when the carrier-concentration increases above a certain value. This is reminiscent of the glass-transition conundrum except that the role of temperature in the latter is played by disorder. Analysis of these findings highlights several issues that challenge our understanding of the disorder-interaction interplay in Anderson insulators.
