Neutron scattering investigation of the acoustic-mode Grüneisen parameters in RbBr

G. Ernst, G. Krexner, G. Quittner, W. Kress, B. Buras, Bente Lebech

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The microscopic Grüneisen parameters in RbBr have been determined for 44 acoustic modes in the main symmetry directions Δ, Σ, and Λ by inelastic neutron scattering under hydrostatic pressure. The experimental data are well described within the framework of a breathing-shell model, which includes third-order anharmonic contributions. The thermal-expansion coefficient has been calculated in the temperature range 0-300 K. The results are in good agreement with the experimental data.
    Original languageEnglish
    JournalPhysical Review B
    Volume29
    Issue number10
    Pages (from-to)5805-5813
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1984

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