Cuprate coexistence under the superconductive dome

Under the superconductive dome of cuprates, the nature of coexistence with pseudogap order is reassessed. Experimental data from the literature are analyzed within two threads: the vital superfluid density and the essential momentum dependence, the latter due to the d-wave nature of superconductivity. For severe underdoping, this analysis suggests superconductivity condenses on the finite density-of-states of the pseudogap at the Fermi level. For intermediate doping, it suggests nucleation of a coherent phase that embodies both superconductive and pseudogap orders which are not separated in momentum-space. Such a coherent-phase nucleation resolves eight mysteries in the literature and indicates potential consistency with a theory of nanoscale stripes.