Elastic Constants and Phonon Dispersion Curves of Tetragonal La2CuO4 Single Crystal
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Abstract
The elastic constants and phonon dispersion curves of tetragonal La2CuO4 single crystal are calculated with rigid-ion model. We obtain rather good agreement between the computed and measured elastic constants. The calculated phonon dispersion curves exhibit a rather conventional behavior except the anomaly of a Σ4, symmetry TO mode at Γ-X direction.
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