  We attain the previously unaccessed full superconducting dome in a pristine
high temperature cuprate superconductor by applying pressures up to 280 kbar to
samples of near stoichiometric YBa2Cu3O7. The obtained superconducting phase
boundary as a function of hole doping closely follows the superconducting dome
in La2-xSrxCuO4. Measurements are now enabled to trace the evolution of various
entangled phases and the Fermi surface from the underdoped to overdoped regime
in a single high purity cuprate superconducting family of materials.
