Crossover to equivalent-neighbor multicritical behavior in arbitrary dimensions
- 1 July 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 28 (1) , 244-246
- https://doi.org/10.1103/physrevb.28.244
Abstract
Spin models subject to both nearest-neighbor and equivalent-neighbor interactions are studied. The free energy of these models is related to the free energy of the nearest-neighbor spin models in a magnetic field. The scaling exponent for equivalent-neighbor interactions is calculated, and crossover from Ising to mean-field criticality is described in arbitrary dimensions. Interesting multicritical behavior is observed for antiferromagnetic nearest-neighbor interactions.Keywords
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