Colloquium with Dr. R. Torsten Clay, Professor, Department of Physics and Astronomy at Mississippi State University
Despite more than thirty years of research, the mechanism of superconductivity in the high critical temperature cuprate superconductors is still under debate. For some time, the “standard model” appropriate for the cuprates has been assumed to be a two-dimensional copper-oxygen plane, with strongly correlated holes on the copper ions playing the most important role. This model, either in one- or three-band forms very successfully describes the antiferromagnetic Mott-Hubbard insulator found in undoped parent compounds of the cuprates.
In this talk Dr. Clay will review the physics of the cuprate superconductors and then present the results of new numerical work for cuprate ladders within a realistic model containing both copper and oxygen atoms. Our results show that the standard model usually assumed to apply for doped cuprates must be reconsidered, and in particular that oxygen degrees of freedom are essential to understand the physics of the cuprates.
Thursday, January 26, 2023 at 3:30pm to 4:30pm