Ultrafast Optically Induced Perturbation of Oxygen Octahedral Rotations in Multiferroic BiFeO 3 Thin Films.

Autor: Li N; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States., Lee HJ; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.; Department of Materials Science and Engineering, Kangwon National University, Samcheok 25913, South Korea., Sri Gyan D; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States., Ahn Y; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States., Landahl EC; Department of Physics and Astrophysics, DePaul University, Chicago, Illinois 60614, United States., Carnis J; Aix Marseille Université, Université de Toulon, CNRS, IM2NP, Marseille 13013, France.; ESRF - The European Synchrotron, 71 Avenue des Martyrs, Grenoble 38000, France., Lee JY; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea., Kim TY; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea., Unithrattil S; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea., Jo JY; School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea., Chun SH; Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, South Korea., Kim S; Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, South Korea., Park SY; Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, South Korea., Eom I; Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, South Korea., Adamo C; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States., Li SJ; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States., Kaaret JZ; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States., Schlom DG; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States.; Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, United States.; Leibniz-Institut für Kristallzüchtung, Max-Born-Straße 2, 12489 Berlin, Germany., Wen H; Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Benedek NA; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States., Evans PG; Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2024 May 29; Vol. 24 (21), pp. 6417-6424. Date of Electronic Publication: 2024 May 06.
DOI: 10.1021/acs.nanolett.4c01519
Abstrakt: The functional properties of complex oxides, including magnetism and ferroelectricity, are closely linked to subtle structural distortions. Ultrafast optical excitations provide the means to manipulate structural features and ultimately to affect the functional properties of complex oxides with picosecond-scale precision. We report that the lattice expansion of multiferroic BiFeO 3 following above-bandgap optical excitation leads to distortion of the oxygen octahedral rotation (OOR) pattern. The continuous coupling between OOR and strain was probed using time-resolved X-ray free-electron laser diffraction with femtosecond time resolution. Density functional theory calculations predict a relationship between the OOR and the elastic strain consistent with the experiment, demonstrating a route to employing this approach in a wider range of systems. Ultrafast control of the functional properties of BiFeO 3 thin films is enabled by this approach because the OOR phenomena are related to ferroelectricity, and via the Fe-O-Fe bond angles, the superexchange interaction between Fe atoms.
Databáze: MEDLINE