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Communications in Theoretical Physics

Phase Diagram and Tricritical Behavior of a Spin-2 Transverse Ising Model in a Random Field

Yaqiu Liang, Guozhu Wei, Song Li-Li, Guoli Song, Zang Shu-Liang

Published Oct 15, 2004• 10 citations
Publisher

Abstract

The phase diagrams of a spin-2 transverse Ising model with a random field on honeycomb, square, and simple-cubic lattices, respectively, are investigated within the framework of an effective-field theory with correlations. We find the behavior of the tricritical point and the reentrant phenomenon for the system with any coordination number z , when the applied random field is bimodal. The behavior of the tricritical point is also examined as a function of applied transverse field. The reentrant phenomenon comes from the competition between the transverse field and the random field.

DOI
10.1088/0253-6102/42/4/623

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