期刊
ADVANCED MATERIALS
卷 23, 期 44, 页码 5268-5274出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201102106
关键词
epitaxy; thin films; charge transport; structure-property relationships
类别
资金
- Spanish MICINN [MAT 2008 06517, CSD2009-00013, CAM S2009-MAT 1756]
- European Research Council
- Materials Sciences and Engineering Division, Office of Basic Energy Sciences, U.S. Department of Energy
- U.S. Department of Energy [DE-FG02-09ER46554]
- McMinn Endowment
- MICINN
- JCCM
Heterostructures combining transition metal oxides, as compared to other materials, are able to accommodate very large amounts of epitaxial strain without breaking into islands or structural domains. Coherently strained interfaces are an interesting playground for the search of materials with enhanced ion diffusivities, of interest in devices for energy generation and storage. In this work we highlight the importance of the interface structure of highly strained YSZ/STO superlattices in determining an enhancement of their ionic conductivity. We show the role of growth orientation in controlling the structure and morphology of the interface. Results of density functional theory calculations are discussed, showing that the incompatibility of the oxygen positions at the interface planes plays a key role in stabilizing the high values of ionic conductivities.
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