Phase Transition in a Long Range Antiferromagnetic Model

Details Phase Transition in a Long Range Antiferromagnetic Model Phase Transition in a Long Range Antiferromagnetic Model

2009-09-19

arxiv.org/abs/0909.3565v1

Phys. Rev. E, 80 (2009) 031115

Physics

Condensed Matter

Statistical Mechanics

3 pages

Scientific paper

We consider an Ising model where longitudinal components of every pair of spins have antiferromagnetic interaction of the same magnitude. When subjected to a transverse magnetic field at zero temperature, the system undergoes a phase transition of second order to an ordered phase and if the temperature is now increased, there is another phase transition to disordered phase. We provide derivation of these features by perturbative treatment up to the second order and argue that the results are non-trivial and not derivable from the known results about related models.

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