Breakdown of self-similar scaling in the two-dimensional random-field Ising model: A Monte Carlo study
- 1 August 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 32 (3) , 1575-1583
- https://doi.org/10.1103/physrevb.32.1575
Abstract
We have simulated the two-dimensional ferromagnetic Ising model in a random magnetic field with spin-flip dynamics. After the system is deeply quenched into the unstable region of the phase diagram, we observe novel dynamical behavior, during an early-to-intermediate time regime, for the average size of the growing domains, R¯. We find that self-similar scaling for the structure factor [that is, scaling to a single time-dependent length such as R¯(t)] breaks down for long times. Our results may have relevance to the problem of island-growth kinetics in some chemisorbed systems.Keywords
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