Local optical properties, electron densities, and london dispersion energies of atomically structured grain boundaries

Quantitative analysis of spatially resolved valence electron energy-loss spectra shows strong physical property contrasts for Sigma5 and near Sigma13 grain boundaries in Fe-doped SrTiO3, resulting in London dispersion interaction energies of 14 to 50 mJ/m(2) between the adjacent grains. The determin...

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Bibliographic Details
Published in:Physical review letters 2004-11, Vol.93 (22), p.227201-227201
Main Authors: van Benthem, Klaus, Tan, Guolong, DeNoyer, Linda K, French, Roger H, Rühle, Manfred
Format: Article
Language:English
Online Access:Get full text
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Summary:Quantitative analysis of spatially resolved valence electron energy-loss spectra shows strong physical property contrasts for Sigma5 and near Sigma13 grain boundaries in Fe-doped SrTiO3, resulting in London dispersion interaction energies of 14 to 50 mJ/m(2) between the adjacent grains. The determination of local physical properties of grain boundary cores and the appreciable contribution of long-range London dispersion to interface energies provides new information on formation and control of interfaces in materials.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.93.227201