We characterize the phase space for the infinite volume limit of a ferromagnetic mean-field XY model in a random field pointing in one direction with two symmetric values. We determine the stationary solutions and detect possible phase transitions in the interaction strength for fixed random field intensity. We show that at low temperature magnetic ordering appears perpendicularly to the field. The latter situation corresponds to a spin-flop transition.

Synchronization and Spin-Flop Transitions for a Mean-Field XY Model in Random Field

Collet, F.;
2016-01-01

Abstract

We characterize the phase space for the infinite volume limit of a ferromagnetic mean-field XY model in a random field pointing in one direction with two symmetric values. We determine the stationary solutions and detect possible phase transitions in the interaction strength for fixed random field intensity. We show that at low temperature magnetic ordering appears perpendicularly to the field. The latter situation corresponds to a spin-flop transition.
2016
Disordered models
Spin-flop transitions
XY models
Interacting particle systems
Mean-field interaction
Phase transition
Reversible Markov processes
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/1094148
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