Elastic properties and electrostructural correlations in ternary scandium-based cubic inverse perovskites: A first-principles study
2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 79, no 125122Article in journal (Refereed) Published
Wehave performed ab initio calculations for the cubic inverse-perovskite Sc3EN(E=Al,Ga,In) systems to study their electronic band-structures and elastic properties.In this study, we used the accurate augmented plane waveplus local orbital method to find the equilibrium structural parametersand to compute the full elastic tensors. The obtained single-crystalelastic constants were used to quantify the stiffness of theSc-based ternary nitrides and to appraise their mechanical stability. Thesite-projected density of states, Fermi surfaces, and the charge-density plotshave also been used to analyze the chemical bonding betweenthe Sc6N cluster and the surrounding metallic lattice of eitherAl, Ga, or In atoms. Our calculations show that Sc3GaNhas the largest covalent Sc-N bonding-type character with the highestYoung, shear, and bulk moduli. Compared with the other twoisoelectronic systems, it also behaves as the most brittle materialwith a relatively large elastic anisotropy.
Place, publisher, year, edition, pages
2009. Vol. 79, no 125122
ab initio calculations, aluminium alloys, APW calculations, band structure, bonds (chemical), crystal structure, elastic constants, elasticity, electronic density of states, Fermi surface, gallium alloys, indium alloys, mechanical stability, scandium alloys, shear modulus, Young's modulus
IdentifiersURN: urn:nbn:se:liu:diva-17559DOI: 10.1103/PhysRevB.79.125122OAI: oai:DiVA.org:liu-17559DiVA: diva2:210342
Original Publication:Maurizio Mattesini, Martin Magnuson, Ferenc Tasnádi, Carina Höglund, Igor A. Abrikosov and Lars Hultman, Elastic properties and electrostructural correlations in ternary scandium-based cubic inverse perovskites: A first-principles study, 2009, Physical Review B. Condensed Matter and Materials Physics, (79), 125122.http://dx.doi.org/10.1103/PhysRevB.79.125122Copyright: American Physical Societyhttp://www.aps.org/2009-04-012009-04-012016-08-31Bibliographically approved