Phase diagram of the spin-1 anisotropic Heisenberg model with a single-ion anisotropy

Details Phase diagram of the spin-1 anisotropic Heisenberg model with a single-ion anisotropy Phase diagram of the spin-1 anisotropic Heisenberg model with a single-ion anisotropy

2006-11-08

arxiv.org/abs/cond-mat/0611212v2

Proceedings of 15th Conference of Slovak Physicists, 11th-14th September 2006, Congress Centre Academia, Stara Lesna, Slovakia

Physics

Condensed Matter

Statistical Mechanics

2 pages, 2 figures, presented at 15th Conference of Slovak Physicists to be held in Stara Lesna on 11th-14th September 2006, S

Scientific paper

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.

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