Bilinear-biquadratic anisotropic Heisenberg model on a triangular lattice

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:340

Article

Pires, A. S. T.

关键词: Heisenberg model;    Antiferromagnet;    Quantum phase transition;   

DOI  :  10.1016/j.jmmm.2013.03.037

来源: Elsevier

【 摘 要 】

Motivated by the fact that the study of disordered phases at zero temperature is of great interest, I study the spin-one quantum antiferromagnet with a next-nearest neighbor interaction on a triangular lattice with bilinear and biquadratic exchange interactions and a single ion anisotropy, using a SU(3) Schwinger boson mean-field theory. I calculate the critical properties, at zero temperature, for values of the single ion anisotropy parameter D above a critical value D-c, where a quantum phase transition takes place from a higher D disordered phase to a lower D ordered phase. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free