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U. C. SRIVASTAVA1,*
The present investigation for the alteration of the free-ion wave functions, when the ions are put in a crystal, the effect of the crystal environment is simulated by the Watson potential. The developed perturbation theoretical model for ionic solids by Basu and sengupta has been used for calculation of the different lattice-dynamical properties for the low-polarizability ionic crystal. The feature of used method it requered only input data necessary for the study of (KF) crystal properties are the Hartree–Fock wave functions of the constituent ions. Certain properties like, the dielectric properties and some phonons in symmetry directions, depend on the excited states of the crystal, are rather sensitive to this effect which varies from crystal. A unified study of the phase transition, cohesion, elastic constant, dielectric and vibrational properties of the (KF) crystal is given without using any adjustable free parameter, our approach and overall agreement obtained is well satisfactory. Finally the limitations and reliability of the present model for estimating the effect of the surroundings are critically discussed..
Phonon dispersion curve, Dielectric & static property, Elastic constant & hormonic values.
U. C. SRIVASTAVA, Unified study of potassium flouride (KF) using perturbation model and Watson potential approximation, Optoelectronics and Advanced Materials - Rapid Communications, 4, 11, November 2010, pp.1786-1790 (2010).
Submitted at: Sept. 28, 2010
Accepted at: Nov. 10, 2010
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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