Volume 50, Number 1, April I 2000
|Page(s)||54 - 60|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 September 2002|
Phase diagram of a classical fluid in a quenched random potential
Department of Physics, Indian Institute of
Science - Bangalore 560012, India and
Condensed Matter Theory Unit, Jawaharlal Nehru Centre for Advanced
Scientific Research -
Bangalore 560064, India
2 Laboratoire d'Etudes des Propriétés Electroniques des Solides (Laboratoire associé à l'Université Joseph Fourier.) Centre National de la Recherche Scientifique - BP166, 38042 Grenoble Cedex 9, France
Accepted: 17 January 2000
We consider the phase diagram of a classical fluid in the presence of a random pinning potential of arbitrary strength. Introducing replicas for averaging over the quenched disorder, we use the hypernetted chain approximation to calculate the correlations in the replicated liquid. The freezing transition of the liquid into a nearly crystalline state is studied using a density functional approach, and the liquid-to-glass transition is studied using a phenomenological replica symmetry breaking approach introduced by Mézard and Parisi. The first-order liquid-to-crystal transition is found to change to a continuous liquid-to-glass transition as the strength of the disorder is increased above a threshold value.
PACS: 64.70.Pf – Glass transitions / 64.70.Dv – Solid-liquid transitions / 05.20.Jj – Statistical mechanics of classical fluids
© EDP Sciences, 2000
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