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Lattice dynamics, thermodynamic and elastic properties of CdGeAs2

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Il Nuovo Cimento D

Summary

An extended Keating’s model with two-bond-stretching and one-angle-bending force constants within the rigid-ion approximation is applied to the investigation of the lattice dynamics of CdGeAs2. Five model parameters of the theory are determined by a least-square fitting to the infrared reflectivity measurements. The phonon spectrum along two high-symmetry directions and the one-phonon density of states are calculated. The theoretical values of the elastic constants, the constant-volume specific heat and the Debye temperature show a reasonable agreement with the experimental data reported by other authors.

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Tyuterev, V.G., Skachkov, S.I. Lattice dynamics, thermodynamic and elastic properties of CdGeAs2 . Il Nuovo Cimento D 14, 1097–1103 (1992). https://doi.org/10.1007/BF02456762

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  • DOI: https://doi.org/10.1007/BF02456762

PACS 63.20

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