Obstructed Cooper pairs in the strong-coupling limit on line-graph lattices have identically vanishing leading-order kinetic energy due to frustration, yielding flat bosonic bands, zero superfluid stiffness, and an exact d-wave RVB spin liquid ground state at quarter filling via mapping to the Rokhs
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Projective symmetry in hexagonal lattices with rational magnetic flux enforces novel non-zero-energy Dirac touchings at pi flux, constrains zero-energy Dirac points for general fluxes, and imposes distinct Chern number rules on gapped bands and multiplets.
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Obstructed Cooper pairs in flat band systems - weakly-coherent superfluids and exact spin liquids
Obstructed Cooper pairs in the strong-coupling limit on line-graph lattices have identically vanishing leading-order kinetic energy due to frustration, yielding flat bosonic bands, zero superfluid stiffness, and an exact d-wave RVB spin liquid ground state at quarter filling via mapping to the Rokhs
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Topological constraints on the electronic band structure of hexagonal lattice in a magnetic field
Projective symmetry in hexagonal lattices with rational magnetic flux enforces novel non-zero-energy Dirac touchings at pi flux, constrains zero-energy Dirac points for general fluxes, and imposes distinct Chern number rules on gapped bands and multiplets.