2015/11/07 by Damian Rybicki, Michael Jurkutat, Steven Reichardt +3 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic orbital #Charge (physics) #Condensed matter physics #Copper #Cuprate #Doping #Electron #High-temperature superconductivity #Magnetic and transport properties of perovskites and related materials #Materials science #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scaling #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1038/ncomms11413
published as Nature Communications 7, 11413 (2016)
arxiv created 2015/11/07 · openalex publication_date 2016/05/06 · arxiv updated 2016/05/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Universal scaling laws can guide the understanding of new phenomena, and for cuprate high-temperature superconductivity the influential Uemura relation showed, early on, that the maximum critical temperature of superconductivity correlates with the density of the superfluid measured at low temperatures. Here we show that the charge content of the bonding orbitals of copper and oxygen in the ubiquitous CuO2 plane, measured with nuclear magnetic resonance, reproduces this scaling. The charge transfer of the nominal copper hole to planar oxygen sets the maximum critical temperature. A three-dimensional phase diagram in terms of the charge content at copper as well as oxygen is introduced, which has the different cuprate families sorted with respect to their maximum critical temperature. We suggest that the critical temperature could be raised substantially if one were able to synthesize materials that lead to an increased planar oxygen hole content at the expense of that of planar copper.