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The Metallic and Ionic Contributions to Lattice Vibrations of III–V Covalent Crystals
Author(s) -
Soma T.,
Kagaya H.Matsuo
Publication year - 1983
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221180130
Subject(s) - pseudopotential , ionic bonding , lattice vibration , phonon , covalent bond , ionic crystal , tetrahedron , condensed matter physics , metal , formalism (music) , lattice (music) , wavelength , materials science , molecular physics , chemistry , crystallography , physics , optics , ion , quantum mechanics , musical , art , acoustics , metallurgy , visual arts
Abstract The binding force, which includes partially ionic contributions in addition to covalent interactions based on the pseudopotential formalism, is proposed for III–V tetrahedral compounds. Numerical calculations on the phonon dispersion curves are performed for GaAs, GaSb, InAs, and InSb. The resulting ones are qualitatively in good agreement with the observed data in spite of no introducing of adjustable parameters except for the optical phonon‐frequency splitting in the long wavelength limit.