Journal
SOLID STATE SCIENCES
Volume 14, Issue 8, Pages 1211-1220Publisher
ELSEVIER
DOI: 10.1016/j.solidstatesciences.2012.06.003
Keywords
Ab initio calculation; Electronic structure; Mechanical properties; Optical properties
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We have performed a first principles study of structural, mechanical, electronic, and optical properties of orthorhombic Sb2S3 and Sb2Se3 compounds using the density functional theory within the local density approximation. The lattice parameters, bulk modulus, and its pressure derivatives of these compounds have been obtained. The second-order elastic constants have been calculated, and the other related quantities such as the Young's modulus, shear modulus, Poisson's ratio, anisotropy factor, sound velocities, Debye temperature, and hardness have also been estimated in the present work. The linear photon-energy dependent dielectric functions and some optical properties such as the energy-loss function, the effective number of valence electrons and the effective optical dielectric constant are calculated. Our structural estimation and some other results are in agreement with the available experimental and theoretical data. (C) 2012 Elsevier Masson SAS. All rights reserved.
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