|Speaker||Prof. Martin Greven (University of Minnesota)|
|Date & Time||2017.05.16, 16:00~17:00|
|Place||Bldg. 19, Rm. 210|
|Title||New insight into the phase diagram of the cuprates|
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 “ normal ” state from which the superconductivity evolves upon cooling. I will review our neutron scattering, X-ray scattering and charge transport results for HgBa 2 CuO 4+ δ , arguably one of the most ideal cuprate compounds for experimental study due to its high structural symmetry and high superconducting transition temperature of nearly 100 K at optimal hole doping. 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 underlying phase diagram of the cuprates.
Host : Prof. Chang Young Kim