YNi and its hydrides : phase stabilities, electronic structures and chemical bonding properties from first principles
Langue
en
Article de revue
Ce document a été publié dans
Chemical Physics. 2010, vol. 377, n° 1-3, p. 109-114
Elsevier
Résumé en anglais
Within density functional theory, establishing the equations of states of previous termYNinext term in two different controversial previous termstructuresnext term in the literature, leads to determine the orthorhombic ...Lire la suite >
Within density functional theory, establishing the equations of states of previous termYNinext term in two different controversial previous termstructuresnext term in the literature, leads to determine the orthorhombic FeB-type as the ground state one with small energy difference. For YNiH3 and YNiH4 previous termhydridesnext term crystallizing in the orthorhombic CrB-type previous termstructurenext term the geometry optimization and the ab initio determination of the H atomic positions show that the previous termstabilitynext term of hydrogen decreases from the tri- to the tetra- previous termhydride.next term New states brought by hydrogen within the valence band lead to its broadening and to enhanced localization of metal density of states. The previous termchemical bondingnext term analysis shows a preferential Ni–H previous termbondingnext term versus Y–H.< Réduire
Mots clés en anglais
DFT
FeB-type
CrB-type
GGA
VASP
ASW
Hydrides
Equation of state
Chemical bonding
Origine
Importé de halUnités de recherche