Abstract
By considering the appropriate finite-size effect, we explain the connection between Monte Carlo simulations of two-dimensional anisotropic Heisenberg antiferromagnet in a field and the early renormalization group calculation for the bicritical point in dimensions. We found that the long-length-scale physics of the Monte Carlo simulations is indeed captured by the anisotropic nonlinear model. Our Monte Carlo data and analysis confirm that the bicritical point in two dimensions is Heisenberg-like and occurs at ; therefore the uncertainty in the phase diagram of this model is removed.
4 More- Received 31 May 2006
DOI:https://doi.org/10.1103/PhysRevB.74.064407
©2006 American Physical Society