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TT: Fachverband Tiefe Temperaturen

TT 80: Correlated Electrons: Poster

TT 80.56: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster E

Relaxation dynamics in the one-dimensional Kondo lattice model — •Arturo Perez Romero and Fabian Heidrich-Meisner — Institut for Theoretical Physics, Georg-August-Universität Göttingen, D-37077 Göttingen, Germany

We study the real-time dynamics of optically excited electrons coupled in a paradigmatic model describing the coupling between localized and conduction electrons, the Kondo lattice model. In particular, we analyze the role of localized electrons interacting with a highly excited carrier at low density for an antiferromagnetic coupling (J>0) via the time-dependent Lanczos method. We implement a ferromagnetic orden for the localized electrons and an opposite spin for the itinerant electron as our initial state. We perform an extensive analysis of the time evolution by calculating the spin-spin correlation between localized electrons and between delocalized and localized electrons and the electronic momentum distribution function. We discuss several dynamical properties, such as the magnetization transfer from the charge carrier to localized spins, the approach of the system to the steady state, and the transient dynamics by considering long and short time scales.

This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via CRC 1073.

Keywords: Kondo lattice model; Lanczos method