期刊
APPLIED PHYSICS LETTERS
卷 102, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4798828
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资金
- Stichting FOM
- Higher Education Commission (HEC) of Pakistan
- Department of Physics, University of Engineering and Technology (UET), Lahore, Pakistan
We have investigated the properties of interfaces between LaAlO3 films grown on SrTiO3 substrates singly terminated by TiO2. We used RF sputtering in a high-pressure oxygen atmosphere. The films are smooth, with flat surfaces. Transmission electron microscopy shows sharp and continuous interfaces with some slight intermixing. The elemental ratio of La to Al, measured by the energy dispersive X-ray technique, is found to be 1.07. Importantly, we find these interfaces to be non-conducting, indicating that the sputtered interface is not electronically reconstructed in the way reported for films grown by pulsed laser deposition because of the different interplays among stoichiometry, mixing, and oxygen vacancies. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798828]
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