Physikalisches Kolloquium
The Rich Physics of Kagome Metals
| Datum: | 16.06.2025, 14:15 - 16:45 Uhr |
| Kategorie: | Kolloquium |
| Ort: | Hubland Süd, Geb. P1 (Physik), Röntgen-Hörsaal, Online |
| Veranstalter: | Fakultät für Physik und Astronomie, Theoretische Physik I, Prof. Dr. Ronny Thomale |
| Vortragende: | Prof. Dr. Domenico di Sante (Università di Bologna, Dipartimento di Fisica e Astronomia "Augusto Righi") |
Am 16. Juni 2025 um 14:15 Uhr findet das nächste Physikalische Kolloquium zum Thema "The Rich Physics of Kagome Metals" statt. Bereits ab 13:45 Uhr können Sie sich im Foyer vor dem Röntgen-Hörsaal auf eine Tasse Kaffee oder Tee treffen.
Long-range electronic ordering emerging from metallic parent phases offers a fertile ground for investigating the complex interplay between structural and electronic degrees of freedom. Kagome lattice materials, in particular, have proven to be an ideal platform for such studies. Among these, the bilayer kagome metals RV6Sn6 (R = rare-earth element) are of special interest due to their topological nature, featuring Dirac-like dispersive states, van Hove singularities, and correlated flat bands [1,2]. Notably, within this family, ScV6Sn6 exhibits a charge density wave (CDW) phase that manifests through anomalies in magnetic susceptibility, neutron scattering, and specific heat measurements. This CDW order presents a distinct motif compared to other kagome systems such as AV3Sb5 (A = K, Rb, Cs) and FeGe.
In this presentation, I will provide an overview of the emerging phenomena in bilayer kagome metals, with a focus on the unique CDW state in ScV6Sn6 [3,4]. Although its microscopic origin remains under debate—competing theories suggest electron-electron versus electron-phonon interactions—our findings highlight a significant role for structural degrees of freedom in stabilizing the charge order.
References:
[1] D. Di Sante et al, Nature Physics 19, 1135 (2023)
[2] H. Li et al, Nature Physics 20, 1103 (2024)
[3] M. Tuniz et al, Communications Materials 4, 103 (2023)
[4] M. Tuniz et al, Phys. Rev. Lett. 134, 066501 (2025)
Teilnahme
Präsenz im Röntgen-Hörsaal und online.
