期刊
PHYSICAL REVIEW LETTERS
卷 88, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.88.236401
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The fluctuations of conductivity sigma with time have been studied in a two-dimensional electron system in low-mobility Si inversion layers. The noise power spectrum is similar to1/f(alpha) with alpha exhibiting a sharp jump at an electron density n(s)=n(g) . A huge 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.
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