R J Baxter 1980 J. Phys. A: Math. Gen. 13 L61 doi:10.1088/0305-4470/13/3/007
R J Baxter
Show affiliationsThe hard-hexagon model in lattice statistics (i.e. the triangular lattice gas with nearest-neighbour exclusion) has been solved exactly. It has a critical point when the activity z has the value 1/2(11+5 square root 5)=11.09017..., with exponents alpha =1/3, beta =1/9. More generally, a restricted class of square-lattice models with nearest-neighbour exclusion and non-zero diagonal interactions can be solved.
05.50.+q Lattice theory and statistics (Ising, Potts, etc.)
64.60.F- Equilibrium properties near critical points, critical exponents
82B23 Exactly solvable models; Bethe ansatz
82B26 Phase transitions (general)
82B20 Lattice systems (Ising, dimer, Potts, etc.) and systems on graphs
Issue 3 (1 March 1980)
R J Baxter 1980 J. Phys. A: Math. Gen. 13 L61
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