XY checkerboard antiferromagnet in external field
arXiv:cond-mat/0310458 · doi:10.1088/0953-8984/16/11/026
Abstract
Ordering by thermal fluctuations is studied for the classical XY antiferromagnet on a checkerboard lattice in zero and finite magnetic fields by means of analytical and Monte Carlo methods. The model exhibits a variety of novel broken symmetries including states with nematic ordering in zero field and with triatic order parameter at high fields.
6 pages