Critical properties of the frustrated quasi-two dimensional XY-like antiferromagnet

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:327

Article

Lapa, R. S.¹  Pires, A. S. T.¹ 

[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil

关键词: XY-model;    Antiferromagnet;    Frustration;    Quantum phase transitions;   

DOI  :  10.1016/j.jmmm.2012.09.006

来源: Elsevier

【 摘 要 】

We study, using a self-consistent harmonic approximation, the quasi-two-dimensional frustrated Heisenberg antiferromagnet with easy-plane single ion anisotropy. Besides the transition temperature from the high-temperature paramagnetic phase to the low-temperature ordered phase, we also obtain, at zero temperature, the critical single ion anisotropy parameter D-c that separates the low D region from the large D quantum paramagnetic phase. We have found disordered phases at zero temperature that could be possible candidates for spin liquids states. (c) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free