# Hard hexagon lattice model

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The **hard hexagon** model has been studied extensively by Baxter and co-workers (Refs. 1-4).

## Disordered regime[edit]

The equation of state and the isothermal compressibility for the hard hexagon model in the disordered regime are given in Ref. 5.

## References[edit]

- R. J. Baxter "Hard hexagons: exact solution", Journal of Physics A: Mathematical and General
**13**pp. L61-L70 (1980) - R. J. Baxter and S. K. Tsang "Entropy of hard hexagons", Journal of Physics A: Mathematical and General
**13**pp. 1023-1030 (1980) - R. J. Baxter "Rogers-Ramanujan identities in the hard hexagon model", Journal of Statistical Physics
**26**pp. 427-452 (1981) - Rodney J. Baxter "Exactly Solved Models in Statistical Mechanics", Academic Press (1982) ISBN 0120831821 Chapter 14 (freely available pdf)
- M. P. Richey and C. A. Tracy "Equation of state and isothermal compressibility for the hard hexagon model in the disordered regime", Journal of Physics A: Mathematical and Theoretical,
**20**pp. L1121-L1126 (1987)