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Combining electronic Raman scattering experiments with cellular dynamicalmean field theory, we present evidence of the pseudogap in the superconductingstate of various hole-doped cuprates. In Bi2Sr2CaCu2O8+d we track thesuperconducting pseudogap hallmark, a peak-dip feature, as a function oftemperature T and doping p, well beyond the optimal one. We show that, at alltemperatures under the superconducting dome, the pseudogap disappears at thedoping pc, between 0.222 and 0.226, where also the normal-state pseudogapcollapses at a Lifshitz transition. This demonstrates that the superconductingpseudogap boundary forms a vertical line in the T-p phase diagram.

Vertical temperature-boundary of the pseudogap under the superconducting dome of the Bi2Sr2CaCu2O8+d phase-diagram