N COLOR ASHKIN-TELLER MODEL IN TWO-DIMENSIONS: SOLUTION IN THE LARGE n LIMIT
19844 pages
Published in:
- Phys.Rev.Lett. 53 (1984) 1967-1970
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Abstract: (APS)
The N-color Ashkin-Teller model is solved exactly in the large-N limit in two dimensions. The phase diagram is found. It is shown that for positive four-spin coupling the transition is first order while for negative four-spin coupling the transition is continuous and Ising type. The specific heat near the second-order transition is calculated and it is found to be finite at the transition because of large corrections to scaling. The latent heat and correlation length at the first-order transition are also calculated.- STATISTICAL MECHANICS: CRITICAL PHENOMENA
- LATTICE FIELD THEORY: TWO-DIMENSIONAL
- MODEL: SPIN
- SPIN: MODEL
- EXPANSION 1/N
- SCALING: CORRECTION
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