Flat Club - Julia Küspert, European Synchrotron Radiation Facility, Grenoble

18.11.2025 12:30 – 14:00

RIXS in Quasi-Two-Dimensional Materials: Examples from the Hard X-ray Regime
Julia Küspert, European Synchrotron Radiation Facility, Grenoble

Resonant inelastic x-ray scattering (RIXS) allows to study electronic and magnetic excitations and their momentum and energy dependencies. For example, the absence of dd excitations at the interfaces of KTaO3 films suggests a deficiency of localized Ta 5d electrons [X. Cai et al., Phys. Rev. B 108, 235167 (2023)]. In [(SrIrO3)m/(SrTiO3)l] heterostructures [E. Paris et al., Phys. Rev. Lett. 135, 186506 (2025)] magnetic modes and spin-orbit excitons were found to persist across the confinement-driven metal to insulator transition.
RIXS interference, the inelastic scattering analogue to Young's double slit experiment, has been proposed to enhance the intensity in energy spectra at ~1 eV in La2-xBaxCuO4 (LBCO) at the charge order wave vector [W. Schülke and C. Sternemann, Phys. Rev. B 84, 085143 (2011)]. We investigate this hypothesis by studying the momentum dependent energy spectra in LBCOboth below and above the charge order onset.

Lieu

Bâtiment: Ecole de Physique

Auditoire Stueckelberg
Pizza: 12:30, Start discussion: 13:00

entrée libre