TY  - JOUR
AU  - Gunkel, F.
AU  - Hoffmann-Eifert, S.
AU  - Dittmann, R.
AU  - Mi, S.B.
AU  - Jia, C.-L.
AU  - Meuffels, P.
AU  - Waser, R.
TI  - High temperature conductance characteristics of LaAlO3/SrTiO3-heterostructures under equilibrium oxygen atmospheres
JO  - Applied physics letters
VL  - 97
SN  - 0003-6951
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-10518
SP  - 012103
PY  - 2010
N1  - Record converted from VDB: 12.11.2012
AB  - 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]
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000279707800024
DO  - DOI:10.1063/1.3457386
UR  - https://juser.fz-juelich.de/record/10518
ER  -