@article{10902/24138,
year = {2021},
month = {11},
url = {http://hdl.handle.net/10902/24138},
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.},
publisher = {Nature Publishing Group},
publisher = {Nature Communications, 2021, 12 (1), art. no. 6273},
title = {Atomic scale crystal field mapping of polar vortices in oxide superlattices},
author = {Sandhya Susarla and García Fernández, Pablo (físico) and Colin Ophus and Sujit Das and Pablo Aguado-Puente and Margaret McCarter and Peter Ercius and Lane W. Martin and Ramamoorthy Ramesh and Junquera Quintana, Francisco Javier},
}