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<strong>Lattice dynamical, elastic properties and sound velocities of γ-Si<sub>3</sub>N<sub>4</sub></strong>

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Title Statement <strong>Lattice dynamical, elastic properties and sound velocities of γ-Si<sub>3</sub>N<sub>4</sub></strong>
 
Added Entry - Uncontrolled Name Kushwaha, A.K. ; Department of Physics, K.N. Govt. P.G. College Gyanpur, Bhadohi-221304 (U.P.)
Not Applicable
 
Uncontrolled Index Term condensed matter physics
γ-Si3N4; Octahedral; Tetrahedral; Zone-centre; phonon
 
Summary, etc. Lattice dynamical, elastic properties and sound velocities of γ-Si<sub>3</sub>N<sub>4</sub> have been calculated by using a proposed six parameter bond-bending force constant model. In this model, the potential energy of the compound γ-Si<sub>3</sub>N<sub>4</sub> is expanded by using the Taylor’s expansion in the harmonic approximation. The proposed theoretical model is used to calculate the zone-centre phonon frequencies, elastic properties, sound velocities and Debye characteristic temperature for γ-Si<sub>3</sub>N<sub>4</sub> and compared our results with experimental and previously calculated results available in the literature. It is found to be in good agreement with the experimental results. The significant outcome of the present work is that the octahedral bonding is stronger than that of the tetrahedral bonding.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2015-09-02 13:27:10
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/6866
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 53, ##issue.no## 9 (2015): Indian Journal of Pure & Applied Physics
 
Language Note en
 
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