Coupled Compositional and Displacive Modulations in KLaMnWO6 Revealed by Atomic Resolution Imaging
Loading...
Official URL
Full text at PDC
Publication date
2021
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Citations
Exportar
Citation
Susana Garcia-Martin, Graham King, Esteban Urones-Garrote, and Patrick M. Woodward
Journal of the American Chemical Society 2021 143 (45), 19121-19127
DOI: 10.1021/jacs.1c07426
Abstract
Complex compositional and displacive modulations of the crystal structure of KLaMnWO6 are imaged with atomic resolution by means of scanning transmission electron microscopy (STEM). This oxide is stabilized by cation vacancies leading to a La1+x/3K1−xMnWO6 stoichiometry. Compositional modulation on both the K and La layers are revealed in the high-angle annular dark-field STEM (HAADF-STEM) images. The compositional modulation within the La layer is coupled with the modulation of the octahedral tilting, which is exposed by imaging of the anion sublattice in annular bright-field STEM (ABFSTEM) images. These complex modulations are accommodated in a 5√2ap × 5√2ap × 2ap perovskite-type structure