Blume-Emery-Griffiths Model in a Random Transverse Field
Ez-Zahraouy, H. · Mahboub, H. · Benyoussef, A. · Ouazzani, M. J.
Original · EN
The effect of the random quantum transverse field Ω on the tricritical behavior of the spin-1 Blume- Emery- Griffiths (BEG) model is studied using effective field theory. It is found, that the tricritical behavior depends on both the biquadratic interaction K, single- ion anisotropy Δ, and the concentration p of the disorder of Ω. Indeed, there exist a special value p₁ of the probability p below which the tricritical behavior disappears.
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