Journal article
Nonstoichiometry and the electrical activity of grain boundaries in SrTiO3
Drexel University. College of Arts and Sciences. Department of Chemistry. Faculty Research and Publications.
18 Sep 2007
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
A combination of experiments and first-principles calculations is used to show that grain boundaries in SrTiO3 are intrinsically nonstoichiometric. Total-energy calculations reveal that the introduction of nonstoichiometry into the grain boundaries is energetically favorable and results in structures that are consistent with atomic-resolution Z-contrast micrographs. Electron energy-loss spectra provide direct evidence of nonstoichiometry. These results and calculations for nonstoichiometric grain boundaries provide an explanation of the microscopic origin of the "double Schottky barriers" that dominate the electrical behavior of polycrystalline oxides.
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Details
- Title
- Nonstoichiometry and the electrical activity of grain boundaries in SrTiO3
- Creators
- Miyoung Kim (Author) - Drexel University (1970-)Gerd Duscher (Author) - Drexel University (1970-)Nigel D. Browning (Author) - Drexel University (1970-)Karl Sohlberg (Author) - Drexel University (1970-)Sokrates T. Pantelides (Author) - Drexel University (1970-)Stephen J. Pennycook (Author) - Drexel University (1970-)
- Publication Details
- Drexel University. College of Arts and Sciences. Department of Chemistry. Faculty Research and Publications.
- Publisher
- Cold Spring Harbor Press
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Arts and Sciences; Mechanical Engineering and Mechanics; Drexel University (1970-); Chemistry
- Web of Science ID
- WOS:000168525900033
- Scopus ID
- 2-s2.0-4243399610
- Other Identifier
- 991014632595704721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Physics, Multidisciplinary