First principles prediction of the elastic, electronic, and optical properties of Sb2S3 and Sb2Se3 compounds

Abstract

We have performed a first principles study of structural, mechanical, electronic, and optical properties of orthorhombic Sb2S3 and Sb2Se3 compounds. The calculations have been carried out within the local density approximation using norm conserving pseudopotentials. The lattice parameters, bulk modulus, and its pressure derivatives of the 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 and Debye temperature 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 valance 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.

20 pages, 4 figures, 5 tables

References in corpus (2)

• Intrinsic Correlation between Hardness and Elasticity in Polycrystalline Materials and Bulk Metallic Glasses
• Elastic properties of mono- and polycrystalline hexagonal AlB2-like diborides of s, p and d metals from first-principles calculations

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• Superconductivity in Strong Spin Orbital Coupling Compound Sb2Se3
• Large anharmonic effect and thermal expansion anisotropy of metal chalcogenides: The case of antimony sulfide
• Theoretical study of phase transitions in Sb2S3, Bi2S3 and Sb2Se3 under compression