Strong-coupling expansion in the t-t' Hubbard model for cuprate parameters produces a d-wave anomalous Green's function whose extrema are shifted from the antinodes by pseudogap effects, yielding a two-gap electron spectrum.
Topological or- der in the pseudogap metal
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Superconductivity of Bad Fermions: Origin of Two Gaps in HTSC Cuprates
Strong-coupling expansion in the t-t' Hubbard model for cuprate parameters produces a d-wave anomalous Green's function whose extrema are shifted from the antinodes by pseudogap effects, yielding a two-gap electron spectrum.