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@ARTICLE{Gunkel:20312,
author = {Gunkel, F. and Brinks, P. and Hoffmann-Eifert, S. and
Dittmann, R. and Huijben, M. and Kleibeuker, J. E. and
Koster, G. and Rijnders, G. and Waser, R.},
title = {{I}nfluence of charge compensation mechanisms on the sheet
electron density at conducting
{L}a{A}l{O}3/{S}r{T}i{O}3-interfaces},
journal = {Applied physics letters},
volume = {100},
issn = {0003-6951},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-20312},
pages = {052103},
year = {2012},
note = {Record converted from VDB: 12.11.2012},
abstract = {The equilibrium conductance of LaAlO3/SrTiO3
(LAO/STO)-heterointerfaces was investigated at high
temperatures (950 K-1100 K) as a function of ambient oxygen
partial pressure (pO(2)). Metallic LAO/STO-interfaces were
obtained for LAO grown on STO single crystals as well as on
STO-buffered (La,Sr)(Al,Ta)O-3 substrates. For both
structures, the high temperature sheet carrier density n(S)
of the LAO/STO-interface saturates at a value of about 1 x
10(14) cm(-2) for reducing conditions, which indicates the
presence of interfacial donor states. A significant decrease
of nS is observed at high oxygen partial pressures.
According to the defect chemistry model of donor-doped STO,
this behavior for oxidizing conditions can be attributed to
the formation of Sr-vacancies as charge compensating
defects. (C) 2012 American Institute of Physics.
[doi:10.1063/1.3679139]},
keywords = {J (WoSType)},
cin = {PGI-7},
ddc = {530},
cid = {I:(DE-Juel1)PGI-7-20110106},
pnm = {Grundlagen für zukünftige Informationstechnologien},
pid = {G:(DE-Juel1)FUEK412},
shelfmark = {Physics, Applied},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000300065300027},
doi = {10.1063/1.3679139},
url = {https://juser.fz-juelich.de/record/20312},
}