Volume 51, Number 2, July 2000
|Page(s)||147 - 153|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Potential energy landscape of finite-size mean-field models for glasses
Dipartimento di Fisica, Università di Roma “La Sapienza”
Unità di Roma I -
P.le Aldo Moro 2, I-00185 Roma, Italy
2 Physics Department, Faculty of Physics, University of Barcelona Diagonal 647, 08028 Barcelona, Spain
Accepted: 18 May 2000
We analyze the properties of the energy landscape of finite-size fully connected spin-glass models with a discontinuous transition. In the thermodynamic limit the equilibrium properties in the high-temperature phase are described by the schematic mode coupling theory of super-cooled liquids. We show that finite-size fully connected spin-glass models do exhibit properties typical of Lennard-Jones systems when both are near the critical glass transition, where thermodynamics is ruled by energy minima distribution. Our study opens the way to consider activated processes in real glasses through finite-size corrections (i.e. calculations beyond the saddle-point approximation) in mean-field spin-glass models.
PACS: 64.70.Pf – Glass transitions / 75.10.Nr – Spin-glass and other random models / 61.20.Gy – Theory and models of liquid structure
© EDP Sciences, 2000
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