CMSA Strongly Correlated Quantum Materials and High-Temperature Superconductors Series: A unified theoretical perspective on the cuprate phase diagram


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May 12, 2021 10:30 am - 12:00 pm
via Zoom Video Conferencing

André-Marie Tremblay - Université de Sherbrooke

Many features of the cuprate phase diagram are a challenge for the usual tools of solid state physics. I will show how a perspective that takes into account both the localized and delocalized aspects of conduction electrons can explain, at least qualitatively, many of these features. More specifically, I will show that the work of several groups using cluster extensions of dynamical mean-field theory sheds light on the pseudogap, on the quantum-critical point and on d-wave superconductivity. I will argue that the charge transfer gap and oxygen hole content are the best indicators of strong superconductivity and that many observations are a signature of the influence of Mott physics away from half-filling. I will also briefly comment on what information theoretic measures tell us about this problem.