Articles dans des revues à comité de lecture
|Cluster extension of the effective interaction approximation: I Quenched bond disorder in the Ising model|
|Guilmin P., Turban L.|
|Journal of Physics C: Solid State Physics 13 (1980) 4077|
|DOI : 10.1088/0022-3719/13/21/013|
A systematic cluster extension of the effective-interaction approximation for quenched-bond disorder in random Ising systems is proposed. For bond dilution, exact results for the critical concentrations are obtained in the single-bond approximation for the self-dual square lattice and in the three-bonds approximation for the dual triangular and honeycomb lattices. Qualitative changes in the critical line are observed in the frustration model when going from the single-bond to the three-bonds approximations.