American Journal of Modern Physics
Volume 3, Issue 5, September 2014, Pages: 195-201
Received: Aug. 20, 2014;
Accepted: Sep. 1, 2014;
Published: Sep. 20, 2014
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Stanislav Felinskyi, Kyiv National Taras Shevchenko University, Faculty of Radiophysics, Electronics and Computer Systems, Kyiv, Ukraine
Georgii Felinskyi, Kyiv National Taras Shevchenko University, Faculty of Radiophysics, Electronics and Computer Systems, Kyiv, Ukraine
The real physical conditions of appearance the negative dielectric permittivity (DP) within frequency TL splitting of polar vibrations in crystals are discussed in this paper. We have derived the simple quantitative criterion for the existence of negative DP band using single oscillation model. Our criterion is presented in three equivalent forms as inequalities between the fundamental crystal constants and spectroscopic parameters of polar vibration. Applicability of our theoretical results for multimode case is demonstrated using 7 known polar vibrations in the model crystal of boron nitride.
Criterion for Existence of the Negative Dielectric Reality in Crystals, American Journal of Modern Physics.
Vol. 3, No. 5,
2014, pp. 195-201.
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