Stiff-Glass Approximation of Mode-Coupling Theory

Details Stiff-Glass Approximation of Mode-Coupling Theory Stiff-Glass Approximation of Mode-Coupling Theory

2001-10-22

arxiv.org/abs/cond-mat/0110461v1

Physics

Condensed Matter

Soft Condensed Matter

8 pages, Proceedings of the 4th IDMRCS (Crete, 2001), to appear in J. Non-Cryst. Sol

Scientific paper

10.1016/S0022-3093(02)01458-8

The stiff-glass approximation of the mode-coupling theory of the glass-transition--as introduced in a recent paper by G\"otze and Mayr for a discussion of phenomena resembling the Boson Peak and High-Frequency Sound observations made in real glass-formers--is examined in detail. It amounts to a neglection of two-phonon processes and thus provides a clear physical picture for the MCT solutions deep in the glass. In addition, the effect of additional symplifying approximations and the combination of these approximations is studied.

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