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Abstract: Polar vortices in oxide superlattices exhibit complex polarization topologies. Using a combination of electron energy loss near-edge structure analysis, crystal field multiplet theory, and first-principles calculations, we probe the electronic structure within such polar vortices in [(PbTiO3)16/(SrTiO3)16] superlattices at the atomic scale. The peaks in Ti L-edge spectra shift systematically depending on the position of the Ti4+ cations within the vortices i.e., the direction and magnitude of the local dipole. First-principles computation of the local projected density of states on the Ti 3d orbitals, together with the simulated crystal field multiplet spectra derived from first principles are in good agreement with the experiments.
Fuente: Nature Communications, 2021, 12 (1), 6273
Editorial: Nature Publishing Group
Fecha de publicación: 01/11/2021
Nº de páginas: 7
Tipo de publicación: Artículo de Revista
DOI: 10.1038/s41467-021-26476-5
ISSN: 2041-1723
Proyecto español: PGC2018-096955-B-C41
Url de la publicación: https://doi.org/10.1038/s41467-021-26476-5
Consultar en UCrea Leer publicación
SUSARLA, SANDHYA
PABLO GARCIA FERNANDEZ
OPHUS, COLIN
DAS, SUJIT
PABLO AGUADO PUENTE
MCCARTER, MARGARET
ERCIUS, PETER
MARTIN, LANE W.
RAMESH, RAMAMOORTHY
FRANCISCO JAVIER JUNQUERA QUINTANA
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