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@ARTICLE{Portz:826806,
author = {Portz, V. and Schnedler, M. and Lymperakis, L. and
Neugebauer, J. and Eisele, H. and Carlin, J.-F. and Butté,
R. and Grandjean, N. and Dunin-Borkowski, Rafal and Ebert,
Ph.},
title = {{F}ermi-level pinning and intrinsic surface states of
{A}l$_{1−x}${I}n$_{x}${N}(101¯0) surfaces},
journal = {Applied physics letters},
volume = {110},
number = {2},
issn = {1077-3118},
address = {Melville, NY},
publisher = {American Inst. of Physics},
reportid = {FZJ-2017-01023},
pages = {022104 -},
year = {2017},
abstract = {The electronic structure of Al1−xInxN(101⎯⎯0)
surfaces is investigated by cross-sectional scanning
tunneling spectroscopy and density functional theory
calculations. The surface exhibits empty Al and/or
In-derived dangling bond states, which are calculated to be
within the fundamental bulk band gap for In compositions
smaller than $60\%.$ The energy of the lowest empty
In-derived surface state is extracted from the tunnel
spectra for lattice-matched Al1–xInxN with In compositions
of x = 0.19 and x = 0.20 to be
EC − 1.82 ± 0.41 and
EC − 1.80 ± 0.56 eV, respectively, in good
agreement with the calculated energies. Under growth
conditions, the Fermi level is hence pinned (unpinned) for
In compositions smaller (larger) than $60\%.$ The analysis
of the tunnel spectra suggests an electron affinity of
∼3.5 eV for nonpolar lattice-matched Al1–xInxN
cleavage surfaces, which is large compared to linearly
interpolated values of polar AlN and InN (0001) surfaces.},
cin = {PGI-5 / ER-C-1},
ddc = {530},
cid = {I:(DE-Juel1)PGI-5-20110106 / I:(DE-Juel1)ER-C-1-20170209},
pnm = {141 - Controlling Electron Charge-Based Phenomena
(POF3-141)},
pid = {G:(DE-HGF)POF3-141},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000392835300034},
doi = {10.1063/1.4973765},
url = {https://juser.fz-juelich.de/record/826806},
}