Accessing the Full Superconducting Dome in Pristine YBa2Cu3O6+x Under   Pressure
  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. 
P. L. Alireza, G. H. Zhang, W. Guo, J. Porras, T. Loew, Y. -T. Hsu, G.   G. Lonzarich, M. Le Tacon, B. Keimer, and Suchitra ...
cond-mat.supr-con