Correlations in Novel Quantum Materials 2023 (CNQM2023)

Session

Strong Correlations: from Models to Materials

25 Jul 2023, 09:00

2D5 (MPI-FKF)

102. What Do We Know Today about the 2D Hubbard model?

Prof. Antoine Georges (Center for Computational Quantum Physics, Flatiron Institute)

25/07/2023, 09:00

Keynote Talk

Simplified as it is, the Hubbard model embodies much of the complexity of the `strong correlation problem’ and has established itself as a paradigmatic model in the field, with physical relevance to both cuprates and cold atomic gases in optical lattices. In this talk, I will argue that several key aspects of its physics in two dimensions can now be established beyond doubt, thanks to the...

66. Fermi surface reconstruction and strange metal behavior at a heavy fermion quantum phase transition

Prof. Jan von Delft (Ludwig-Maximilians-Universität München)

25/07/2023, 09:45

Invited Talk

We address the sudden reconstruction of the Fermi surface (FS) at the Kondo breakdown (KB) quantum critical point (QCP) in heavy fermion systems. We focus on results on the periodic Anderson model, obtained using a two-site cellular dynamical mean-field theory (CDMFT) approach. By employing the Numerical Renormalization Group to solve the effective impurity model, we are able to dispose of the...

43. Let’s get real – Adapting the toolkit of many-body theory to realistic materials simulation

Emanuel Gull (University of Michigan, Ann Arbor)

25/07/2023, 10:45

Invited Talk

Quantum many-body theories, including diagrammatic perturbation theories and non-perturbative embedding theories, describe the physics of many interacting particles in solids. These theories are typically applied to effective low-energy lattice models, which are designed to capture the essential degrees of freedom of a solid.
This talk will summarize recent progress on solving the many-body...

57. Novel phenomena and perspectives in 3d- and 5d- transition metal compounds

Matthieu Le Tacon (IQMT KIT)

25/07/2023, 11:15

Invited Talk

Transition metal compounds in which electrons from partially filled d-shells strongly interact with each other keep challenging the standard theory of solids as new, emergent exotic electronic orders are experimentally observed. Despite vastly different macroscopic properties, e.g. high temperature superconductivity (HTS), electronic nematicity or density waves to cite a few, the electronic...