Beyond DMFT: Spin Fluctuations, Pseudogaps and Superconductivity

Abstract

This Chapter of the Jülich Summer School 2022 provides for a first reading on diagrammatic extensions of dynamical-mean-field theory and their application to spin fluctuations, pseudogap physics and supercondcutivtiy. The contents is as follows: 1 Introduction 2 Dynamical vertex approximation 3 Ladder dynamical vertex approximation 4 Hubbard model, cuprates and nickelates 5 Spin fluctuations 6 Pseudogap 7 Superconductivity 8 Conclusion and outlook

arXiv commentChapter of Dynamical Mean-Field Theory of Correlated Electrons, Reihe: Modeling and Simulations}, Vol.~12 (Forschungszentrum Jülich, 2022). E. Pavarini, E. Koch, D. Vollhardt, and A. I. Lichtenstein (Eds.)