Gunkel, F.
[Author];
Hoffmann-Eifert, S.
[Author];
Dittmann, R.
[Author];
Mi, S.B.
[Author];
Jia, C.-L.
[Author];
Meuffels, P.
[Author];
Waser, R.
[Author]
High temperature conductance characteristics of LaAlO3/SrTiO3-heterostructures under equilibrium oxygen atmospheres
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Media type:
E-Article
Title:
High temperature conductance characteristics of LaAlO3/SrTiO3-heterostructures under equilibrium oxygen atmospheres
Contributor:
Gunkel, F.
[Author];
Hoffmann-Eifert, S.
[Author];
Dittmann, R.
[Author];
Mi, S.B.
[Author];
Jia, C.-L.
[Author];
Meuffels, P.
[Author];
Waser, R.
[Author]
imprint:
American Institute of Physics, 2010
Published in:Applied physics letters 97, 012103 (2010). doi:10.1063/1.3457386
Footnote:
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Description:
The interface conductance of LaAlO3/SrTiO3 heterostructures was investigated under high temperature oxygen equilibrium. The dependence of the heterostructure's conductance on oxygen partial pressure (from 10(-22) to 1 bar) and temperature (800 to 1100 K) was compared to the characteristic of SrTiO3 single crystals, which is described in terms of a defect chemistry model. Up to 950 K the equilibrated heterostructures reveal an additional influence of a metallic-like conduction path with a very slight dependence on the oxygen partial pressure. Donor-type interface states which may result from either lattice distortions or A-site cation intermixing during processing are discussed as a possible origin for the exceptional interface conduction of LaAlO3/SrTiO3 heterostructures. (C) 2010 American Institute of Physics. [doi:10.1063/1.3457386]