Metal-insulator transition and glassy behavior in two-dimensional electron systems

Dragana Popovic; Snezana Bogdanovich; Jan J. Jaroszynski; Teun M. Klapwijk

doi:10.1117/12.488847

9 May 2003 Metal-insulator transition and glassy behavior in two-dimensional electron systems

Dragana Popovic, Snezana Bogdanovich, Jan J. Jaroszynski, Teun M. Klapwijk

Proceedings Volume 5112, Noise as a Tool for Studying Materials; (2003) https://doi.org/10.1117/12.488847
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

Abstract

Studies of low-frequency resistance noise demonstrate that glassy freezing occurs in a two-dimensional electron system in silicon in the vicinity of the metal-insulator transition (MIT). The width of the metallic glass phase, which separates the 2D metal and the (glassy) insulator, depends strongly on disorder, becoming extremely small in high-mobility (low-disorder) samples. The glass transition is manifested by a sudden and dramatic slowing down of the electron dynamics, and by a very abrupt change to the sort of statistics characteristic of complicated multistate systems. In particular, the behavior of the second spectrum, an important fourth-order noise statistic, indicates the presence of long-range correlations between fluctuators in the glassy phase, consistent with the hierarchical picture of glassy dynamics.

Citation Download Citation

Dragana Popovic, Snezana Bogdanovich, Jan J. Jaroszynski, and Teun M. Klapwijk "Metal-insulator transition and glassy behavior in two-dimensional electron systems", Proc. SPIE 5112, Noise as a Tool for Studying Materials, (9 May 2003); https://doi.org/10.1117/12.488847

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