Three-dimensional Ising model confined in low-porosity aerogels: a Monte Carlo study

Details Three-dimensional Ising model confined in low-porosity aerogels: a Monte Carlo study Three-dimensional Ising model confined in low-porosity aerogels: a Monte Carlo study

2006-04-26

arxiv.org/abs/cond-mat/0604592v2

Phys. Rev. B 74, 054201 (2006)

Physics

Condensed Matter

Statistical Mechanics

10 pages, 10 figures. Submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.74.054201

The influence of correlated impurities on the critical behaviour of the 3D Ising model is studied using Monte Carlo simulations. Spins are confined into the pores of simulated aerogels (diffusion limited cluster-cluster aggregation) in order to study the effect of quenched disorder on the critical behaviour of this magnetic system. Finite size scaling is used to estimate critical couplings and exponents. Long-range correlated disorder does not affect critical behavior. Asymptotic exponents differ from those of the pure 3D Ising model (3DIS), but it is impossible, with our precision, to distinguish them from the randomly diluted Ising model (RDIS).

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