The Landscape of the Hubbard model HARVARD Talk online: Subir Sachdev Highly Frustrated Magnetism...
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1. Honeycomb lattice: semi-metal and antiferromagnetism Dirac fermions and the Gross-Neveu model 2. Spin liquids Unified formulation as a SO(4) gauge theory 3. Instabilities of spin liquids Geometric phases, valence bond solids, and other competing orders Outline