2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/22494Ordering 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 pagesStrongly Correlated ElectronsStatistical Mechanicstext