Phase diagram of Bi2Sr2CaCu2O8+δ revisited

Abstract

The doping level of cuprate superconductors is usually difficult to determine. Here, Drozdov et al. report spectroscopic studies of in-situ modified Bi2Sr2CaCu2O8+δ , exploring not only the superconducting dome but also the previously inaccessible, non-superconducting regime of the phase diagram, with absolute determination of the doping level.