Direct evidence for cation non-stoichiometry and cottrell atmospheres around dislocation cores in functional oxide interfaces

Miryam Arredondo, Quentin Ramasse, Matthew Weyland, Reza Mahjoub, Ionela Vrejoiu, Dietrich Hesse, Nigel Browning, Marin Alexe, Paul Munroe, Valanoor Nagarajan

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Abstract

Long-range strain fields associated with dislocation cores at an oxide interface are shown to be sufficient enough to create significant variations in the chemical composition around the core (Cottrell atmospheres). Such stress-assisted diffusion of cations towards the cores is proposed to significantly impact the properties of nanoscale functional devices. The figure shows a Z-contrast image of a single dislocation core at an oxide interface.
Original languageEnglish
Pages (from-to)2430 - 2434
Number of pages5
JournalAdvanced Materials
Volume22
Issue number22
DOIs
Publication statusPublished - 2010

Cite this

Arredondo, M., Ramasse, Q., Weyland, M., Mahjoub, R., Vrejoiu, I., Hesse, D., Browning, N., Alexe, M., Munroe, P., & Nagarajan, V. (2010). Direct evidence for cation non-stoichiometry and cottrell atmospheres around dislocation cores in functional oxide interfaces. Advanced Materials, 22(22), 2430 - 2434. https://doi.org/10.1002/adma.200903631