Influence of the Reaction Field On the Nature of the Phase-transition In the Potts-model

Dekeyser, R.; Maritan, Amos; Stella, Attilio

doi:10.1088/0305-4470/16/8/017

It is shown how Onsager's reaction field may be incorporated in mean-field-like calculations for the q-state Potts model. Its influence on the nature of the phase transition is considered both in a one-site and a two-site cluster approximation. Considerable improvement is obtained for qc(d), the value which separates first- and second-order transitions. The way in which qc(d) is modified when a second-neighbour interaction is added to the ferromagnetic nearest-neighbour one is also studied.

Titolo:	Influence of the Reaction Field On the Nature of the Phase-transition In the Potts-model
Autori:	R. DEKEYSER MARITAN, AMOS STELLA, ATTILIO mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1983
Rivista:	JOURNAL OF PHYSICS. A, MATHEMATICAL AND GENERAL
Abstract:	It is shown how Onsager's reaction field may be incorporated in mean-field-like calculations for the q-state Potts model. Its influence on the nature of the phase transition is considered both in a one-site and a two-site cluster approximation. Considerable improvement is obtained for qc(d), the value which separates first- and second-order transitions. The way in which qc(d) is modified when a second-neighbour interaction is added to the ferromagnetic nearest-neighbour one is also studied.
Handle:	http://hdl.handle.net/11577/2509511
Appare nelle tipologie:	01.01 - Articolo in rivista

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