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@ARTICLE{Klobes:173154,
author = {Klobes, B. and Bessas, D. and Juranyi, F. and Görlitz, H.
and Pacheco, V. and Hermann, Raphael},
title = {{E}ffect of nanocrystallinity on lattice dynamics in {B}i
$_{2}$ {T}e $_{3}$ based thermoelectrics},
journal = {Physica status solidi / Rapid research letters},
volume = {9},
number = {1},
issn = {1862-6254},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2014-06567},
pages = {57–61},
year = {2015},
abstract = {The lattice dynamics in as-cast and nanocrystalline
thermoelectric Bi2Te3 based p-type and n-type material were
investigated using inelastic neutron scattering. Generalized
densities of phonon states show substantial agreement
between the lattice dynamics in as-cast samples and previous
studies. The lattice dynamics in the nanocrystalline
materials differ significantly from its as-cast counterparts
in the acoustic phonon regime. In nanocrystalline p-type and
n-type compounds, the average acoustic phonon group velocity
was found to be reduced to $80(5)\%$ and $95(2)\%$ of the
value in as-cast material. It is argued that point-defect
and strain contrast scattering may play an important role
for the understanding of lattice thermal conductivity in
(nanocrystalline) Bi2Te3 based thermoelectrics beside the
observed decrease of sound velocity},
cin = {JCNS-2 / PGI-4 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6213 - Materials
and Processes for Energy and Transport Technologies
(POF3-621) / 6G4 - Jülich Centre for Neutron Research
(JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6213 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000348763500009},
doi = {10.1002/pssr.201409479},
url = {https://juser.fz-juelich.de/record/173154},
}