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@ARTICLE{Nemk:280292,
author = {Nemšák, S. and Conti, G. and Palsson, G. K. and Conlon,
C. and Cho, S. and Rault, J. E. and Avila, J. and Asensio,
M.-C. and Jackson, C. A. and Moetakef, P. and Janotti, A.
and Bjaalie, L. and Himmetoglu, B. and Van de Walle, C. G.
and Balents, L. and Schneider, C. M. and Stemmer, S. and
Fadley, C. S.},
title = {{O}bservation by resonant angle-resolved photoemission of a
critical thickness for 2-dimensional electron gas formation
in {S}r{T}i{O}$_{3}$ embedded in {G}d{T}i{O}$_{3}$},
journal = {Applied physics letters},
volume = {107},
number = {23},
issn = {1077-3118},
address = {Melville, NY},
publisher = {American Inst. of Physics},
reportid = {FZJ-2016-00081},
pages = {231602 -},
year = {2015},
abstract = {For certain conditions of layer thickness, the interface
between GdTiO3 (GTO) and SrTiO3 (STO) in multilayer samples
has been found to form a two-dimensional electron gas(2DEG)
with very interesting properties including high mobilities
and ferromagnetism. We have here studied two trilayer
samples of the form [2 nm GTO/1.0 or 1.5 unit cells
STO/10 nm GTO] as grown on (001)
(LaAlO3)0.3(Sr2AlTaO6)0.7, with the STO layer thicknesses
being at what has been suggested is the critical thickness
for 2DEG formation. We have studied these with Ti-resonant
angle-resolved and angle-integrated photoemission and find
that the spectral feature in the spectra associated with the
2DEG is present in the 1.5 unit cell sample, but not in the
1.0 unit cell sample. We also observe through core-level
spectra additional states in Ti and Sr, with the strength of
a low-binding-energy state for Sr being associated with the
appearance of the 2DEG, and we suggest it to have an origin
in final-state core-hole screening.},
cin = {PGI-6},
ddc = {530},
cid = {I:(DE-Juel1)PGI-6-20110106},
pnm = {522 - Controlling Spin-Based Phenomena (POF3-522)},
pid = {G:(DE-HGF)POF3-522},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000367010800012},
doi = {10.1063/1.4936936},
url = {https://juser.fz-juelich.de/record/280292},
}