Temperature Dependence of Relaxation Rate in KH2PO4 above Tc

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dr__v_s_bist
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Dr. V. S. Bist
Dr. V. S. Bist
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N. S. Panwar
N. S. Panwar
Ξ± Hemwati Nandan Bahuguna Garhwal University

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Temperature Dependence of Relaxation Rate in KH2PO4 above Tc

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Abstract

With the help of the modified four-particle cluster model Hamiltonian [GJSFR, 10, 18(2010)], the theoretical expressions for the relaxation rate of polarization fluctuation have been evaluated and discussed for the KH 2 PO 4 (KDP)-type crystals by using the double-time thermal dependent retarded Green’s functions techniques and Dyson’s equation treatment. The correlations appearing in the dynamic equation have been evaluated using double-time thermal dependent retarded Green’s functions techniques and Dyson’s equation treatment. Without any decoupling the higher order correlations have been evaluated using the renormalized Hamiltonian. By fitting model values in the theoretical expressions, temperature dependence of relaxation rate is calculated for the KH 2 PO 4 (KDP)-type crystals. Theoretical results are compared with experimental result of Garland and Novotny [1969 Phys Rev. 177 971]. A good agreement has been found.

References

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

dr__v_s_bist. 1970. \u201cTemperature Dependence of Relaxation Rate in KH2PO4 above Tc\u201d. Global Journal of Science Frontier Research - A: Physics & Space Science GJSFR-A Volume 13 (GJSFR Volume 13 Issue A1): .

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GJSFR Volume 13 Issue A1
Pg. 35- 38
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Crossref Journal DOI 10.17406/GJSFR

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With the help of the modified four-particle cluster model Hamiltonian [GJSFR, 10, 18(2010)], the theoretical expressions for the relaxation rate of polarization fluctuation have been evaluated and discussed for the KH 2 PO 4 (KDP)-type crystals by using the double-time thermal dependent retarded Green’s functions techniques and Dyson’s equation treatment. The correlations appearing in the dynamic equation have been evaluated using double-time thermal dependent retarded Green’s functions techniques and Dyson’s equation treatment. Without any decoupling the higher order correlations have been evaluated using the renormalized Hamiltonian. By fitting model values in the theoretical expressions, temperature dependence of relaxation rate is calculated for the KH 2 PO 4 (KDP)-type crystals. Theoretical results are compared with experimental result of Garland and Novotny [1969 Phys Rev. 177 971]. A good agreement has been found.

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Temperature Dependence of Relaxation Rate in KH2PO4 above Tc

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

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