Universality in Glassy Low-Temperature Physics

Details Universality in Glassy Low-Temperature Physics Universality in Glassy Low-Temperature Physics

2002-02-20

arxiv.org/abs/cond-mat/0202340v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures, uses RevTeX4

Scientific paper

10.1209/epl/i2003-00397-8

We propose a microscopic translationally invariant glass model which exhibits two level tunneling systems with a broad range of asymmetries and barrier heights in its glassy phase. Their distribution is qualitatively different from what is commonly assumed in phenomenological models, in that symmetric tunneling systems are systematically suppressed. Still, the model exhibits the usual glassy low-temperature anomalies. Universality is due to the collective origin of the glassy potential energy landscape. We obtain a simple explanation also for the mysterious {\em quantitative} universality expressed in the unusually narrow universal glassy range of values for the internal friction plateau.

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