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TT: Fachverband Tiefe Temperaturen
TT 54: Correlated Electrons: Charge Order
TT 54.3: Vortrag
Freitag, 21. März 2025, 10:00–10:15, H33
Charge Density Wave and Phonon Softening in EuAl4 — •Aleksandr Sukhanov1, Steven Gebel1, Artem Korshunov2, and Marein Rahn1 — 1Experimental Physics VI, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany — 2Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal, 20018 San Sebastian, Spain
EuAl4 is a rare earth intermetallic in which competing itinerant and/or indirect exchange mechanisms give rise to a complex magnetic phase diagram, including a centrosymmetric skyrmion lattice. These phenomena arise not in the tetragonal parent structure but in the presence of a charge density wave (CDW), which lowers the crystal symmetry and renormalizes the electronic structure. Microscopic knowledge of the corresponding atomic modulations and their driving mechanism is a prerequisite for a deeper understanding of the resulting equilibrium of electronic correlations and how it might be manipulated.
In my talk, I present inelastic x-ray scattering results, which can clarify the origin of the CDW in EuAl4.
Keywords: charge density wave; lattice dynamics; inelastic neutron scattering; skyrmions; magnetic frustration