Generalized HK model with Landau interactions shows partially flat bands via mean-field theory consistent with fermion condensation, plus a pseudospin mapping and an exactly solvable variant with unique ground state.
This phase is only stable if double occu- pancies are punished by a sufficiently strong interaction U > U c(1)
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Fermion condensation in a generalized Hatsugai-Kohmoto model with momentum-mixing Landau interactions
Generalized HK model with Landau interactions shows partially flat bands via mean-field theory consistent with fermion condensation, plus a pseudospin mapping and an exactly solvable variant with unique ground state.