Spin and density overlaps in the frustrated Ising lattice gas

Details Spin and density overlaps in the frustrated Ising lattice gas Spin and density overlaps in the frustrated Ising lattice gas

2001-11-07

arxiv.org/abs/cond-mat/0111111v1

Phys. Rev. E 65, 16132 (2001)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 10 figures

Scientific paper

10.1103/PhysRevE.65.016132

We perform large scale simulations of the frustrated Ising lattice gas, a three-dimensional lattice model of a structural glass, using the parallel tempering technique. We evaluate the spin and density overlap distributions, and the corresponding non-linear susceptibilities, as a function of the chemical potential. We then evaluate the relaxation functions of the spin and density self-overlap, and study the behavior of the relaxation times. The results suggest that the spin variables undergo a transition very similar to the one of the Ising spin glass, while the density variables do not show any sign of transition at the same chemical potential. It may be that the density variables undergo a transition at a higher chemical potential, inside the phase where the spins are frozen.

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