Seminar on Condensed Matter Theory
Group of Theoretical Physics at the Department of Condensed Matter Physics
of Charles University has a pleasure to invite you to attend the seminar
on 9th May 2024 at 14:00
at Faculty of Mathematics and Physics of Charles University, Ke Karlovu 5, 121 16 Praha 2
Seminar room F 052
Diego Soler Polo, Ph.D.
Institute of Physics of the CAS, Cukrovarnicka 10, Prague,
Theoretical model for multi-orbital Kondo screening in strongly correlated molecules with several unpaired electrons
Diego Soler Polo, Ph.D. » Theoretical model for multi-orbital Kondo screening in strongly correlated molecules with several unpaired electrons
Institute of Physics of the CAS, Cukrovarnicka 10, Prague,
Note the change, the seminar will take place from 2:00 p.m. in F2
Location: Lecture room F2 (MFF UK, Ke Karlovu 5)
The mechanism of Kondo screening in strongly correlated molecules with several unpaired electrons on a metal surface is still under debate. Here, we provide a theoretical framework that rationalizes the emergence of Kondo screening involving several extended molecular orbitals with unpaired electrons. We introduce a~perturbative model, which provides simple rules to identify the presence of anti-ferromagnetic (AFM) spin-flip channels involving charged molecular multiplets responsible for Kondo screening. The Kondo regime is confirmed by numerical renormalization group calculations. In addition, we introduce the concept of Kondo orbitals as virtual molecular orbitals associated with Kondo screening process, which provide a direct interpretation of experimental dI/dV maps of Kondo resonances. We demonstrate that this theoretical framework can be applied to different strongly correlated open-shell molecules on metal surfaces, in good agreement with published experimental data.