Bicritical or tetracritical: the 3D anisotropic Heisenberg antiferromagnet
Shan-Ho Tsai, Siyan Hu, David Paul Landau
The classical uniaxially anisotropic Heisenberg antiferromagnet on the simple cubic lattice, in the presence of an external magnetic field, is believed to have a multicritical point; however, there has been controversy whether it is a bicritical or a tetracritical point. We perform Monte Carlo simulations of this model and analyze the components of the staggered magnetization, the susceptibilities and the probability distribution of the magnetization to conclude that the multicritical point is bicritical and it is in the three-dimensional Heisenberg universality class.
Journal of Physics Conference Series•Mar 11, 2014•3 citations