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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Electric fields induce flat one-magnon bands in the distorted sawtooth chain when DM couplings follow the KNB magnetoelectric form, with explicit field strengths derived for bond-aligned fields.
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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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Electric-field driven flat bands in the distorted sawtooth chain via the Katsura-Nagaosa-Balatsky mechanism
Electric fields induce flat one-magnon bands in the distorted sawtooth chain when DM couplings follow the KNB magnetoelectric form, with explicit field strengths derived for bond-aligned fields.