J. Phys. IV France 12 (2002) Pr9-311
Thermodynamics of disordered elastic systems in the Bragg glass phaseG. Schehr1, T. Giamarchi2 and P. Le Doussal1
1 LPTENS, UMR 8549 du CNRS, 24 rue Lhomond, 75231 Paris cedex 05, France
2 DPMC, Université de Genève, Genève, Switzerland
We study the thermodynamics of a pinned quantum object when the elastic description applies, e.g. in the Bragg glass phase for a crystal with point disorder or for a single elastic line. Using the replica variational method we compute the specific heat both in the quantum and classical limits. In the quantum regime, we show that the specific heat behaves - at low temperature - as T3 in dimension d = 2 and d = 3.
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