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@ARTICLE{SchferNolte:203126,
author = {Schäfer-Nolte, E. O. and Stoica, T. and Gotschke, T. and
Limbach, F. A. and Sutter, E. and Sutter, P. and
Grützmacher, D. and Calarco, R.},
title = {{E}nhanced light scattering of the forbidden longitudinal
optical phonon mode studied by micro-{R}aman spectroscopy on
single {I}n{N} nanowires},
journal = {Nanotechnology},
volume = {21},
number = {31},
issn = {1361-6528},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {FZJ-2015-05141},
pages = {315702 -},
year = {2010},
abstract = {In the literature, there are controversies on the
interpretation of the appearance in InN Raman spectra of a
strong scattering peak in the energy region of the
unscreened longitudinal optical (LO) phonons, although a
shift caused by the phonon–plasmon interaction is expected
for the high conductance observed in this material. Most
measurements on light scattering are performed on ensembles
of InN nanowires (NWs). However, it is important to
investigate the behavior of individual nanowires and here we
report on micro-Raman measurements on single nanowires. When
changing the polarization direction of the incident light
from parallel to perpendicular to the wire, the expected
reduction of the Raman scattering was observed for
transversal optical (TO) and E2 phonon scattering modes,
while a strong symmetry-forbidden LO mode was observed
independently on the laser polarization direction. Single
Mg- and Si-doped crystalline InN nanowires were also
investigated. Magnesium doping results in a sharpening of
the Raman peaks, while silicon doping leads to an asymmetric
broadening of the LO peak. The results can be explained
based on the influence of the high electron concentration
with a strong contribution of the surface accumulation layer
and the associated internal electric field.},
cin = {PGI-9 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000279961200019},
doi = {10.1088/0957-4484/21/31/315702},
url = {https://juser.fz-juelich.de/record/203126},
}