Onset of Glassy Dynamics in a Two-Dimensional Electron System in Silicon

Snezana Bogdanovich; Dragana Popovic

doi:10.1103/physrevlett.88.236401

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Onset of Glassy Dynamics in a Two-Dimensional Electron System in Silicon

Snezana Bogdanovich·Dragana Popovic

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Abstract

The time-dependent fluctuations of conductivity σhave been studied in a two-dimensional electron system in low-mobility, small-size Si inversion layers. The noise power spectrum is ~1/f^α with αexhibiting a sharp jump at a certain electron density n_s=n_g. An enormous increase in the relative variance of σis 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.

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Snezana Bogdanovich, Dragana Popovic. 2002-04-23. Onset of Glassy Dynamics in a Two-Dimensional Electron System in Silicon. https://doi.org/10.1103/physrevlett.88.236401

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