Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 3: Complex Magnetic Oxides

MA 3.4: Vortrag

Montag, 9. März 2026, 10:15–10:30, POT/0112

Exploring the electronic structure of (111)-oriented La_0.7Sr_0.3MnO₃ through soft X-ray ARPES and DFT — •Øyvind Finnseth, Sverre M. Selbach, Hendrik Bentmann, and Ingrid Hallsteinsen — NTNU, Trondheim, Norway

While La_0.7Sr_0.3MnO₃ (LSMO) has been widely studied due to its room-temperature ferromagnetism and half-metallicity, the majority of work has been focused on thin films in the (001)-orientation. The less conventional (111)-orientation has received far less attention despite its distinct intriguing properties, including sixfold in-plane magnetic anisotropy and enhanced interfacial coupling in heterostructures. As such, a full description of the electronic structure of LSMO in this orientation is lacking. Here, we consider epitaxial thin films of LSMO grown by pulsed laser deposition on (111)-oriented SrTiO₃ substrates. We first develop an in-vacuum methodology for surface preparation of the films by annealing in an oxygen atmosphere. The electronic band structure of the films is probed by soft X-ray angle-resolved photoemission spectroscopy (ARPES) using a synchrotron lightsource. The tunability of the photon energy allows for precise control of the probed out-of-plane momentum, yielding a full description of the LSMO electronic band structure. Density functional theory (DFT) calculations are performed to obtain the theoretical band structure of bulk LSMO modeled through the use of the special quasirandom structures approach. By comparing the calculated band structure to the experimental results, we find that the DFT calculations are able to accurately predict the LSMO electronic band structure.

Keywords: ARPES; DFT; Thin films; Ferromagnets; Complex oxides