Critical behavior of the spin-3/2 Blume-Capel model in two dimensions

Article

关键词: EMERY-GRIFFITHS MODEL;    RENORMALIZATION-GROUP;    TRANSITION;    DIAGRAM;    SYSTEMS;    CHAIN;    POINT;   

DOI  :  10.1103/PhysRevB.57.11575

来源: SCIE

【 摘 要 】

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 other spin-3/2 quantum chains. Our results indicate that, different 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.

【 授权许可】

Free