Monte Carlo study of O(3) antiferromagnetic models in three dimensions

Article

关键词: SPIN-1/2 HEISENBERG-ANTIFERROMAGNET;    FRUSTRATED QUANTUM ANTIFERROMAGNETS;    VALENCE-BOND;    PHASE-TRANSITIONS;    SQUARE LATTICE;    GROUND-STATES;    NEEL STATE;    ORDER;    PEIERLS;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.53.2537

来源: SCIE

【 摘 要 】

We study three antiferromagnetic formulations of the O(3) spin model in three dimensions by means of Monte Carlo simulations: (1) a two parameter sigma model with nearest- and next-nearest neighbors couplings in a cubic lattice; (2) a face-centered-cubic lattice with nearest-neighbor interaction; (3) a cubic lattice with a set of fully frustrating couplings. We discuss in all cases the vacua properties and analyze the phase transitions. Using finite-size scaling analysis we conclude that all phase transitions found are of first order.

【 授权许可】

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