%0 Journal Article
%A Gunkel, F.
%A Hoffmann-Eifert, S.
%A Dittmann, R.
%A Mi, S.B.
%A Jia, C.-L.
%A Meuffels, P.
%A Waser, R.
%T High temperature conductance characteristics of LaAlO3/SrTiO3-heterostructures under equilibrium oxygen atmospheres
%J Applied physics letters
%V 97
%@ 0003-6951
%C Melville, NY
%I American Institute of Physics
%M PreJuSER-10518
%P 012103
%D 2010
%Z Record converted from VDB: 12.11.2012
%X 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]
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000279707800024
%R 10.1063/1.3457386
%U https://juser.fz-juelich.de/record/10518