Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 80: Gerhard Ertl Young Investigator Award Competition
O 80.3: Vortrag
Donnerstag, 12. März 2026, 11:30–12:00, TRE/PHYS
Exchange-driven magnetoelastic coupling in a correlated itinerant ferromagnet — •Carolina A. Marques1, Luke C. Rhodes1, Weronika Osmolska1, Harry Lane1, Izidor Benedičič1, Masahiro Naritsuka1, Siri A. Berge1, Rosalba Fittipaldi2, Mariateresa Lettieri2, Antonio Vecchione2, and Peter Wahl1,3 — 1SUPA, School of Physics and Astronomy, University of St Andrews, UK — 2CNR-SPIN, c/o Università di Salerno, Italy — 3Physikalisches Institut, Universität Bonn, Germany
The electronic properties of materials are the result of the complex relationship between lattice and electronic degrees of freedom. In magnetic materials, exchange interactions leads to magnetoelastic coupling, whose effect can be enhanced by the presence of electronic correlations. In the itinerant ferromagnet Sr4Ru3O10, its magnetic and electronic properties are strongly influenced by electron correlations driven by Van Hove singularities close to the Fermi level. Here, we detect changes to the electronic structure, magnetic ground state and lattice in Sr4Ru3O10 using scanning tunneling microscopy and spectroscopy (STM/STS). By switching between ferromagnetic and anti-ferromagnetic alignment of the magnetization of the surface and subsurface layers, we study the impact of exchange interaction on the electronic structure and detect jumps in the interlayer spacing, revealing giant exchange magnetostriction in Sr4Ru3O10. Our measurements reveal a direct link between exchange interaction, electronic and crystal structures, providing a platform to test theoretical descriptions of strongly correlated electron materials.
Keywords: Magnetoelastic coupling; Correlated electrons; Exchange interaction; Scanning tunneling microscopy