Article (Scientific journals)
121Sb and125Te nuclear inelastic scattering in Sb2Te3under high pressure
Simon, R. E.; Sergueev, I.; Kantor, I. et al.
2014In Semiconductor Science and Technology, 29 (12)
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Keywords :
Density of phonon states; Grüneisen parameter; High pressure; Nuclear inelastic scattering; Sb2te3 tetradymite; Crystal lattices; Inelastic scattering; Phonons; Synchrotron radiation; X ray diffraction; Covalent bonding; Density of phonon state; Element specific; Inelastic spectra; Room temperature; Space Groups; Total density; Antimony
Abstract :
[en] We investigated the lattice dynamics of Sb2Te3 under high pressure using 121Sb and 125Te nuclear inelastic scattering of synchrotron radiation. We measured the room temperature 121Sb and 125Te inelastic spectra at 15(1) GPa and 77(3) GPa and extracted the Te and Sb element specific density of phonon states of δ-Sb2Te3 at 77(3) GPa. X-ray diffraction confirms the sample to be in the cubic δ-Sb2Te3 phase with space group Im3m and lattice constant a = 3.268(4) A˚. The total density of phonon states of δ-Sb2Te3 strongly resembles the one of amorphous GeSb2Te4, suggesting the presence of covalent bonding in contrast to the resonance bonding in α-Sb2Te3. From the density of phonon states of δ-Sb2Te3 a mean speed of sound of 2.61(6) km s-1 and Debye temperatures of 278(10) K for Te and 296(10) K for Sb were determined. © 2014 IOP Publishing Ltd.
Disciplines :
Physics
Author, co-author :
Simon, R. E.;  Jülich Centre for Neutron Science JCNS, Peter Grünberg Institut PGI, Forschungszentrum Jülich GmbH, Jülich, Germany, Faculté des Sciences, Université de Liège, Liège, Belgium
Sergueev, I.;  Deutsches Elektronen-Synchrotron, Hamburg, Germany
Kantor, I.;  European Synchrotron Radiation Facility, BP 220, Grenoble, France
Kantor, A.;  European Synchrotron Radiation Facility, BP 220, Grenoble, France
Perßon, J.;  Jülich Centre for Neutron Science JCNS, Peter Grünberg Institut PGI, Forschungszentrum Jülich GmbH, Jülich, Germany
Hermann, Raphaël ;  Université de Liège > Département de chimie (sciences) > Département de chimie (sciences)
Language :
English
Title :
121Sb and125Te nuclear inelastic scattering in Sb2Te3under high pressure
Publication date :
2014
Journal title :
Semiconductor Science and Technology
ISSN :
0268-1242
eISSN :
1361-6641
Publisher :
Institute of Physics Publishing
Volume :
29
Issue :
12
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
SFB917
Funders :
DFG - Deutsche Forschungsgemeinschaft [DE]
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