Specific heat and the phase diagram of the Ising square lattice with nearest- and next-nearest interactions Article uri icon

abstract

  • The specific heat and the phase diagram of the Ising square lattice with nearest- (J1) and next-nearest-neighbour (J2) interactions are studied within the cluster variation method. The Ising Hamiltonian is solved in the square (Wannier-Kramer) approximation. The phase diagram is calculated and compared with other previous studies.

publication date

  • 1993-01-01