New insight into the phase diagram of the cuprates

Martin Greven
University of Minnesota
Thursday, May 31, 2018
3:30 pm
RH 101


The discovery of high-temperature superconductivity in the cuprates three decades ago triggered a tremendous amount of scientific activity, yet it has remained a challenge to understand the unusual state from which the superconductivity evolves upon cooling. I will review our neutron scattering, X-ray scattering and charge transport results for HgBa2CuO4+δ, arguably one of the most ideal cuprate compounds for experimental study due to its high structural symmetry and high optimal superconducting transition temperature of nearly 100 K. These experiments reveal an unusual magnetic response, charge-density-wave correlations, and Fermi-liquid behavior below optimal hole doping. I will show how the comparison with the properties of other compounds gives new insight into the phase diagram of the cuprates.

Alexander Chernyshev / Jing Xia