Local optical properties, electron densities, and london dispersion energies of atomically structured grain boundaries |
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Authors: | van Benthem Klaus Tan Guolong DeNoyer Linda K French Roger H Rühle Manfred |
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Affiliation: | Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, 70569 Stuttgart, Germany. |
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Abstract: | 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. |
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