Interaction-induced spatial correlations in a disordered glass

A consequence of the disorder and Coulomb interaction competition is electron-glass phase observed in several Anderson-insulators. The these systems, typically degenerate semiconductors, stronger than interaction, more so higher carrier-concentration N system. Here we report on a new feature In_{x}O with lowest yet studied. feature, resolved as broad peak field-effect measurements, has not been recognized previously studied Several empirical facts associated phenomenon are consistent conjecture that it reflects correlated charge-distribution. In particular, may be turned off by gate-voltage maneuvering, suggesting relevance charge-arrangements. It also suppressed either; temperature, non-ohmic field, or exposure to infrared illumination. After being washed-out, reappears when system allowed relax for sufficiently long time. puzzling aspect arises apparent absence increases above certain value. This reminiscent glass-transition conundrum except role temperature latter played disorder. Analysis findings highlights issues challenge our understanding disorder-interaction interplay Anderson insulators.