Bare t-J models reproduce the experimentally observed ladder DSF without an explicit attraction, and phonon downfolding yields attraction while three-band downfolding mostly does not.
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Towards effective models for low-dimensional cuprates: From ground state Hamiltonian reconstruction to spectral functions
Bare t-J models reproduce the experimentally observed ladder DSF without an explicit attraction, and phonon downfolding yields attraction while three-band downfolding mostly does not.