Lattice Dynamics of Potassium Halides (KCI, KBr and KI)

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概要

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• To investinate the lattice dynamics of r>otassiunx halides a newlv r>rorosed7-parameter bond-bending force model (BBFM) is used. The total poterrtial energyof the system incorporates the short-range forces (radial-fbond-bending) aswell as the long range Coulombic interactions. The 7 parameters employed inthe present treatment are determined by making use of the experimental valuesof three elastic constants, four critical point phonon frequencies and the latticeequilibrium condition. The model has been applied to calculate the phonondispersion relations, phonon density of states and the Debye-characteristic term-reratures (&o) of KCI, KBr, and Kl. Theoretical results have been comparedwith the available experimental data. [1: is observed that the agreement betweentheory and experiment is very good and thus gives a confidence in this approach.The remarkable features pertaining to the physical significance of the model havebeen discussed.

• 社団法人日本物理学会の論文
• 1980-02-15

著者

• Kushwaha S.S.

  Department of Physics,Banaras Hindu University

• Kushwaha M.S.

  Department of Physics,Banaras Hindu University

関連論文

• Optical Investigations of Lattice Vibrations of II-VI Compound Semiconductors
• Phonon Dispersion Relations for GaAs and InSb
• The Root-Mean-Square-Amplitudes and Melting Criteria of Compound Semiconductors
• Lattice Dynamics of Potassium Halides (KCI, KBr and KI)
• Lattice Vibrations and Heat Capacities of Solid Neon and Xenon

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