Lieb-Mattis Model for Two Interpenetrating Antiferromagnets

TL;DRAbstract

We investigate a frustrated Lieb-Mattis-like spain-1/2 model that is a reference model for the corresponding square-lattice Heisenberg model describing the unusual magnetic properties of Ba 2 Cu3 O 4 Cl2 . Due to frustration we obtain a rich magnetic phase diagram. We find two critical temperatures in accordance with recent experiments on Ba2Cu3O4Cl2.

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