Elastic Constants and Phonon Dispersion Curves of Tetragonal La<suB>2</suB>CuO<suB>4</suB> Single Crystal

Chin. Phys. Lett.

1991, Vol. 8

Issue (4): 195-198 DOI:

Original Articles

Elastic Constants and Phonon Dispersion Curves of Tetragonal La₂CuO₄ Single Crystal

MU Yaoming;TAO Ruibao^*

Department of Physics, Fudan University, Shanghai 200433 ^*also Center of Theoretical Physics (CCAST World Laboratory), Beijing 100080

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MU Yaoming, TAO Ruibao 1991 Chin. Phys. Lett. 8 195-198

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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.

Keywords: 62.20.Dc 63.20.Dj

Published: 01 April 1991

PACS:	62.20.Dc
	63.20.Dj

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1991/V8/I4/0195

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