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@ARTICLE{Parshin:824842,
author = {Parshin, P. P. and Chumakov, A. I. and Alekseev, P. A. and
Nemkovskiy, Kirill and Persson, Jörg and Dubrovinsky, L.
and Kantor, A. and Rüffer, R.},
title = {{E}xperimental observation of phonons as spectators in
{F}e{S}i electronic gap formation},
journal = {Physical review / B},
volume = {93},
number = {8},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2016-07344},
pages = {081102},
year = {2016},
abstract = {The evolution of a phonon spectrum in a narrow-gap
semiconductor FeSi was investigated in a wide range of
temperatures (46 K ≤T≤297 K, P=0.1 MPa) and pressures
(0.1 MPa ≤P≤43 GPa, T=297 K) using nuclear inelastic
scattering of synchrotron radiation with the energy
resolution 0.53 meV. Decreasing temperature as well as
increasing pressure causes a strong reorganization of the
phonon spectrum manifested in splitting and shifts of the
phonon peaks. The phonon spectra measured under the
temperature and pressure conditions corresponding to the
same unit cell volume reveal nearly complete matching. On
the contrary, the spectra measured under the conditions of
the equal mean-square atomic displacements differ
drastically. These observations suggest that the
transformation of the electronic spectrum of FeSi is
controlled predominantly by the change of the unit cell
volume. The corresponding changes of the interatomic forces
and the resulting modification of the phonon spectrum appear
as the direct consequence of this transformation.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2 / PGI-4},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000369404500001},
doi = {10.1103/PhysRevB.93.081102},
url = {https://juser.fz-juelich.de/record/824842},
}