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Direct determination of born — von Kármán force constants for face-centred cubic elements from measured phonon frequencies

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Czechoslovak Journal of Physics B Aims and scope

Abstract

Born — von Kármán force constants are shown, by refining a procedure developed recently, to depend linearly on certain squared phonon frequencies. A 17x17 matrix of coefficients in such linear equations for crystals with the copper structure is given. An illustrative example (Pd) exhibits good agreement with reliable published model force constants; moreover, a higher degree of precision has probably been obtained. Some problems concerning extensions of the procedure to other structures and to more realistic lattice-dynamical models are outlined.

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References

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Authors and Affiliations

  1. Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16, Praha 2, Czechoslovakia

    V. Frei

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  1. V. Frei
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Additional information

The author wishes to thank J. Bok and D. Frei for valuable technical assistance.

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Frei, V. Direct determination of born — von Kármán force constants for face-centred cubic elements from measured phonon frequencies. Czech J Phys 35, 1049–1052 (1985). https://doi.org/10.1007/BF01676365

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  • DOI: https://doi.org/10.1007/BF01676365

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