Elastic properties and bonding of the AgGaSe sub(2) chalcopyrite

Full-potential linearized augmented plane waves (FPLAPW) calculations have been used to determine the equilibrium properties and elastic constants of the chalcopyrite phase of AgGaSe sub(2). The topological analysis of the electron density shows a clear polar bonding, with the integrated basin charg...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2010-09, Vol.405 (17), p.3658-3664
Main Authors: Ouahrani, Tarik, Otero-De-La-Roza, Alberto, Reshak, AH, Khenata, R, Faraoun, H I, Amrani, B, Mebrouki, M, Luana, Victor
Format: Article
Language:English
Subjects:
Bonding
Bulk modulus
Chalcopyrite
Compressibility
Condensed matter
Covalence
Elastic constants
Gallium
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Summary:Full-potential linearized augmented plane waves (FPLAPW) calculations have been used to determine the equilibrium properties and elastic constants of the chalcopyrite phase of AgGaSe sub(2). The topological analysis of the electron density shows a clear polar bonding, with the integrated basin charges revealing a clear dominance of the covalent over the ionic character. The bonding analysis also provides a partition of the bulk modulus and compressibility into atomic contributions. Se is seen to dominate the global behavior (B=51.2 GPa), with a local bulk modulus intermediate between the values of the other two atoms: 44.8 (Ga), 51.1 (Se), and 56.6 GPa (Ag).
ISSN:0921-4526
DOI:10.1016/j.physb.2010.05.061