The Critical Behaviour of the Spin-3/2 Blume-Capel Model in Two Dimensions

Дата и время публикации : 1999-01-19T10:35:38Z

Авторы публикации и институты :
J. C. Xavier
F. C. Alcaraz
D. Pena Lara
J. A. Plascak

Ссылка на журнал-издание: Phys. Rev. B vol. 57 pg. 11575 (1998)
Коментарии к cтатье: latex 18 pages, 4 figures
Первичная категория: cond-mat.stat-mech

Все категории : cond-mat.stat-mech

Краткий обзор статьи: 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 $tau$-continuum Hamiltonian version is also considered and compared with others spin-3/2 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. We also presented new results for the spin-1 Blume-Capel model.

Category: Physics