Bicritical point and crossover in a two-temperature, diffusive kinetic Ising model

Journal Article · Mon Sep 05 00:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.1320· OSTI ID:7224746

Bassler, K E; Racz, Z ^[1]

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1. Center for Stochastic Processes in Science and Engineering, and Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States)

The phase diagram of a two-temperature kinetic Ising model which evolves by Kawasaki dynamics is studied using Monte Carlo simulations in dimension [ital d]=2 and solving mean-spherical approximation in general [ital d]. We show that the equal-temperature (equilibrium) Ising critical point is a bicritical point where two nonequilibrium critical lines meet a first-order line separating two distinct ordered phases. The shape of the nonequilibrium critical lines is described by a crossover exponent, [ital cphi], which we find to be equal to the susceptibility exponent, [gamma], of the Ising model.

• OSTI ID: 7224746
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:10; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CALCULATION METHODS
CRYSTAL MODELS
DIAGRAMS
DYNAMICS
ISING MODEL
MATHEMATICAL MODELS
MECHANICS
MONTE CARLO METHOD
PHASE DIAGRAMS
TWO-DIMENSIONAL CALCULATIONS