Diagrammatic Monte Carlo on the Lieb lattice shows linear pairing response divergence yielding a crossover T* as controlled upper bound on Tc, largest at band-touching points.
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Numerically Exact Study of Flat-Band Superconductivity
Diagrammatic Monte Carlo on the Lieb lattice shows linear pairing response divergence yielding a crossover T* as controlled upper bound on Tc, largest at band-touching points.