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Proceedings Paper

Glassy behavior of a two-dimensional electron system in Si in parallel magnetic fields
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Paper Abstract

Studies of low-frequency resistance noise show that the glassy freezing of the two-dimensional electron system (2DES) in Si in the vicinity of the metal-insulator transition (MIT) persists in parallel magnetic fields B of up to 9 T. At low B, both the glass transition density ng and nc, the critical density for the MIT, increase with B such that the width of the metallic glass phase (nc < ns < n g) increases with B. At higher B, where the 2DES is spin polarized, nc and ng no longer depend on B. Our results demonstrate that charge, as opposed to spin, degrees of freedom are responsible for glassy ordering of the 2DES near the MIT.

Paper Details

Date Published: 25 May 2004
PDF: 6 pages
Proc. SPIE 5469, Fluctuations and Noise in Materials, (25 May 2004); doi: 10.1117/12.545304
Show Author Affiliations
Jan Jaroszynski, Florida State Univ. (United States)
Dragana Popovic, Florida State Univ. (United States)
Teun M. Klapwijk, Technische Univ. Delft (Netherlands)

Published in SPIE Proceedings Vol. 5469:
Fluctuations and Noise in Materials
Dragana Popovic; Michael B. Weissman; Zoltan A. Racz, Editor(s)

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