Temperature Dependence of Inverse Dielectric Susceptibility in KDP-Type Crystals

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dr__v_s_bist
dr__v_s_bist
2
V. S. Bist
V. S. Bist
3
N. S. Panwar
N. S. Panwar
1 H.N.B.Garhwal University

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By using four particle cluster model Hamiltonian along with third and fourth order phonon anharmonic interaction terms for KDP-type crystals, expressions for renormalized soft mode frequency, and inverse dielectric susceptibility have been obtained. The method of double time temperature dependent Green’s function has been used for calculation. Fitting the values of model parameters, the temperature dependence of soft mode frequency and inverse dielectric susceptibility has been evaluated. The inverse dielectric susceptibility was observed increases linearly with temperature, for KDP crystal, in its paraelectric phase. Theoretical results are compared with experimental results of Kim et al [Physics Review B73, 134114 (2006), and Current Applied

32 Cites in Articles

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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dr__v_s_bist. 2013. \u201cTemperature Dependence of Inverse Dielectric Susceptibility in KDP-Type Crystals\u201d. Global Journal of Science Frontier Research - A: Physics & Space Science GJSFR-A Volume 13 (GJSFR Volume 13 Issue A6): .

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GJSFR Volume 13 Issue A6
Pg. 23- 28
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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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August 24, 2013

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English

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By using four particle cluster model Hamiltonian along with third and fourth order phonon anharmonic interaction terms for KDP-type crystals, expressions for renormalized soft mode frequency, and inverse dielectric susceptibility have been obtained. The method of double time temperature dependent Green’s function has been used for calculation. Fitting the values of model parameters, the temperature dependence of soft mode frequency and inverse dielectric susceptibility has been evaluated. The inverse dielectric susceptibility was observed increases linearly with temperature, for KDP crystal, in its paraelectric phase. Theoretical results are compared with experimental results of Kim et al [Physics Review B73, 134114 (2006), and Current Applied

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Temperature Dependence of Inverse Dielectric Susceptibility in KDP-Type Crystals

V. S. Bist
V. S. Bist
N. S. Panwar
N. S. Panwar

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