Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 57: Correlated Magnetism – Kagome Systems
TT 57.8: Talk
Wednesday, March 11, 2026, 17:00–17:15, CHE/0091
Correlation effects in extended Kagome Hubbard models — •Alon Strugatsky and Roser Valenti — Goethe-Universität Frankfurt, Frankfurt am Main, Germany
Kagome materials display a rich interplay of topology, strong electronic correlations, and lattice dynamics. Recently, attention has focused on a class of Kagome metals whose nearly flat bands sit close to the Fermi level. Examples include FeGe, CsV3Sb5, YbCr6Ge6. Such systems are natural hosts for flat-band phenomena (for instance, flat-band ferromagnetism and unconventional superconsuctivity), but their large density of states makes perturbative diagrammatic approaches challenging. Here, we present a systematic study using dynamical mean-field theory (DMFT) and cluster DMFT on an extended Kagome Hubbard model, and map the phase diagram at various fillings.
Keywords: Kagome metals; Flat bands; Strong correlations; DMFT; Hubbard model