Article (Scientific journals)
A density-functional study on the electronic and vibrational properties of layered antimony telluride
Stoffel, R. P.; Deringer, V. L.; Simon, R. E. et al.
2015In Journal of Physics: Condensed Matter, 27 (8)
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Keywords :
Antimony; Chemical bonds; Dispersions; Electronic properties; Electronic structure; Hybrid materials; Lattice theory; Local density approximation; Antimony telluride; Density-functional study; Dispersion correction; Economic densities; Generalized gradient approximations; Lattice dynamical properties; Thermal displacements; Vibrational properties; Density functional theory
Abstract :
[en] We present a comprehensive survey of electronic and lattice-dynamical properties of crystalline antimony telluride (Sb2Te3). In a first step, the electronic structure and chemical bonding have been investigated, followed by calculations of the atomic force constants, phonon dispersion relationships and densities of states. Then, (macroscopic) physical properties of Sb2Te3 have been computed, namely, the atomic thermal displacement parameters, the Grüneisen parameter γ, the volume expansion of the lattice, and finally the bulk modulus B. We compare theoretical results from three popular and economic density-functional theory (DFT) approaches: the local density approximation (LDA), the generalized gradient approximation (GGA), and a posteriori dispersion corrections to the latter. Despite its simplicity, the LDA shows excellent performance for all properties investigated - including the Grüneisen parameter, which only the LDA is able to recover with confidence. In the absence of computationally more demanding hybrid DFT methods, the LDA seems to be a good choice for further lattice dynamical studies of Sb2Te3 and related layered telluride materials. © 2015 IOP Publishing Ltd.
Disciplines :
Chemistry
Author, co-author :
Stoffel, R. P.;  Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
Deringer, V. L.;  Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
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
Hermann, Raphaël ;  Université de Liège > Département de chimie (sciences) > Département de chimie (sciences)
Dronskowski, R.;  Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany, JARA-HPC, RWTH Aachen University, Aachen, Germany
Language :
English
Title :
A density-functional study on the electronic and vibrational properties of layered antimony telluride
Publication date :
2015
Journal title :
Journal of Physics: Condensed Matter
ISSN :
0953-8984
eISSN :
1361-648X
Publisher :
Institute of Physics Publishing, United Kingdom
Volume :
27
Issue :
8
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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