The Critical Behaviour of the Spin-3/2 Blume-capel Model in Two Dimensions
نویسندگان
چکیده
The phase diagram of the spin-3/2 Blume-Capel model in two dimensions is explored by conventional finite-size scaling, conformal invariance and Monte Carlo simulations. The model in its τ -continuum Hamiltonian version is also considered and compared with others spin3/2 quantum chains. Our results indicate that differently from the standard spin-1 Blume-Capel model there is no multicritical point along the order-disorder transition line. This is in qualitative agreement with mean field prediction but in disagreement with previous approximate renormalization group calculations. ∗ Present Address: Departamento de Fisica, Universidad del Valle, AA 25360 Cali Colombia.
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تاریخ انتشار 1999