Differentiating Hund from Mott physics in a three-band Hubbard-Hund model: Temperature dependence of spectral, transport, and thermodynamic properties
K. M. Stadler, Gabriel Kotliar, Seung‐Sup B. Lee, Andreas Weichselbaum, Jan von Delft
Abstract
For many years, strong electronic correlations in metals have mainly been associated with `Mottness' driven by the Coulomb repulsion, which suppresses charge fluctuations. Recently, `Hundness', induced by Hund's rule coupling that affects spin dynamics, has gained recognition as another route to strong correlations. Using dynamical mean-field theory and the numerical renormalization group, the authors identify numerous fingerprints distinguishing Hundness from Mottness in the temperature dependence of various physical quantities for a minimal model of Hund metals.
Topics & Concepts
Hubbard modelCondensed matter physicsPhysicsCoulombStrongly correlated materialRenormalization groupCharge (physics)Coupling (piping)Spin (aerodynamics)Dynamical mean field theoryQuantum mechanicsMaterials scienceSuperconductivityThermodynamicsElectronMetallurgyPhysics of Superconductivity and MagnetismAdvanced Condensed Matter PhysicsQuantum and electron transport phenomena