Direct Visualization of Localized Vibrations at Complex Grain Boundaries

Direct Visualization of Localized Vibrations at Complex Grain Boundaries

© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 13 vom: 08. März, Seite e2208920
Auteur principal: Hoglund, Eric R (Auteur)
Autres auteurs: Bao, De-Liang, O'Hara, Andrew, Pfeifer, Thomas W, Hoque, Md Shafkat Bin, Makarem, Sara, Howe, James M, Pantelides, Sokrates T, Hopkins, Patrick E, Hachtel, Jordan A
Format: Article en ligne
Langue:English
Publié: 2023
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article dislocations grain boundaries local atomic vibrations phonons vibrational states
Description
Résumé:© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.
Grain boundaries (GBs) are a prolific microstructural feature that dominates the functionality of a wide class of materials. The functionality at a GB results from the unique atomic arrangements, different from those in the grain, that have driven extensive experimental and theoretical studies correlating atomic-scale GB structures to macroscopic electronic, infrared optical, and thermal properties. In this work, a SrTiO3 GB is examined using atomic-resolution aberration-corrected scanning transmission electron microscopy and ultrahigh-energy-resolution monochromated electron energy-loss spectroscopy, in conjunction with density functional theory. This combination enables the correlation of the GB structure, nonstoichiometry, and chemical bonding with a redistribution of vibrational states within the GB dislocation cores. The new experimental access to localized GB vibrations provides a direct route to quantifying the impact of individual boundaries on macroscopic properties
Description:Date Completed 29.03.2023
Date Revised 29.03.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202208920