Lanczos exact diagonalization study of field-induced phase transition for Ising and Heisenberg antiferromagnets
Strongly Correlated Electrons
2009-10-31 v1
Abstract
Using an exact diagonalization treatment of Ising and Heisenberg model Hamiltonians, we study field-induced phase transition for two-dimensional antiferromagnets. For the system of Ising antiferromagnet the predicted field-induced phase transition is of first order, while for the system of Heisenberg antiferromagnet it is the second-order transition. We find from the exact diagonalization calculations that the second-order phase transition (metamagnetism) occurs through a spin-flop process as an intermediate step.
Keywords
Cite
@article{arxiv.cond-mat/9901210,
title = {Lanczos exact diagonalization study of field-induced phase transition for Ising and Heisenberg antiferromagnets},
author = {Seung-Pyo Hong and Choong-Seok Kim and Sung-Sik Lee and Sung-Ho Suck Salk},
journal= {arXiv preprint arXiv:cond-mat/9901210},
year = {2009}
}
Comments
4 pages, 4 figures