Onset of Glassy Dynamics in a Two-Dimensional Electron System in Silicon
Strongly Correlated Electrons
2009-11-07 v3 Disordered Systems and Neural Networks
Mesoscale and Nanoscale Physics
Abstract
The time-dependent fluctuations of conductivity \sigma have been studied in a two-dimensional electron system in low-mobility, small-size Si inversion layers. The noise power spectrum is ~1/f^{\alpha} with \alpha exhibiting a sharp jump at a certain electron density n_s=n_g. An enormous increase in the relative variance of \sigma is observed as n_s is reduced below n_g, reflecting a dramatic slowing down of the electron dynamics. This is attributed to the freezing of the electron glass. The data strongly suggest that glassy dynamics persists in the metallic phase.
Keywords
Cite
@article{arxiv.cond-mat/0106545,
title = {Onset of Glassy Dynamics in a Two-Dimensional Electron System in Silicon},
author = {Snezana Bogdanovich and Dragana Popovic},
journal= {arXiv preprint arXiv:cond-mat/0106545},
year = {2009}
}
Comments
minor changes; to appear in Phys. Rev. Letters