Jan Dely, Jozef Strecka, Lucia Canova
Published 2006-11-08, updated 2007-03-21Version 2
The spin-1 anisotropic Heisenberg model with a single-ion anisotropy is studied using the Oguchi's pair approximation. Although the theory is developed for lattices with general coordination number, we treat in detail the three-dimensional lattice with the lowest coordination number, i.e. diamond lattice, where the critical and tricritical behavior of the system is analyzed as a function of both the single-ion anisotropy and exchange anisotropy.
Comments: 2 pages, 2 figures, presented at 15th Conference of Slovak Physicists to be held in Stara Lesna on 11th-14th September 2006, Slovakia
Journal: Proceedings of 15th Conference of Slovak Physicists, 11th-14th September 2006, Congress Centre Academia, Stara Lesna, Slovakia, p. 93 (ISBN 978-80-969124-4-5, EAN 9788096912445)
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