Nonequilibrium relaxation study on spin glass model

Nobuyasu Ito and Yukiyasu Ozeki

Physica A: Statistical Mechanics and its Applications, 2003, vol. 321, issue 1, 262-270

Abstract: Ferromagnetic (FM) transition point and universality class of the ±J Ising model on cubic lattice are studied by computer simulation using the nonequilibrium relaxation (NER) method. At FM bond density p between multicritical one pmc and 1, static exponents take universal values which are different from those of p=1 or p=pmc, and they are consistent with the values of the random-fixed point and of the simulations and experiments for diluted Ising systems. The dynamical exponent, however, seems to depend on p and not to be universal, although it may be due to finite-time correction. The estimation of pmc on square lattice is also refined to be 0.8894(9), which is consistent with the Nishimori and Nemoto's conjecture, 0.889972⋯.

Keywords: Nonequilibrium relaxation; ±J Ising model; Disordered; Random; Harris’ criterion; Spin glass (search for similar items in EconPapers)
Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:321:y:2003:i:1:p:262-270

DOI: 10.1016/S0378-4371(02)01773-9

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