Phonon dispersion curves for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">La</mi></mrow><mrow><mn>1.85</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Sr</mi></mrow><mrow><mn>0.15</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CuO</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math>

Torben Brun; M. Grimsditch; K. E. Gray; R. Bhadra; V. Maroni; C.-K. Loong

doi:10.1103/PhysRevB.35.8837

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Phonon dispersion curves for ${La}_{1.85}$ ${Sr}_{0.15}$ ${CuO}_{4}$

Torben Brun, M. Grimsditch, K. E. Gray, R. Bhadra, V. Maroni, and C.-K. Loong

Phys. Rev. B 35, 8837(R) – Published 1 June 1987

Abstract

Using a simple mechanical model we have calculated the bare phonon dispersion curves for (La,Sr $)_{2}$ ${CuO}_{4}$ . Fitting the frequencies of the four Raman modes and one infrared (IR) mode, our calculation reproduces the position of the other IR modes for which experimental evidence exists as well as the shear-wave velocity. This calculation yields information on the phonons which may be important for an understanding of the superconductivity.

Received 11 May 1987

DOI:https://doi.org/10.1103/PhysRevB.35.8837

Authors & Affiliations

Torben Brun, M. Grimsditch, K. E. Gray, R. Bhadra, and V. Maroni

Materials Science Division, Argonne National Laboratory, Argonne Illinois 60439

C.-K. Loong

Intense Pulsed Neutron Source, Argonne National Laboratory, Argonne, Illinois 60439

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Vol. 35, Iss. 16 — 1 June 1987

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