Soft Phonon and Central Peak Scattering in Molecular Crystal System: C6CI402 (chloranil)

W. D. Ellenson, Jørgen Kjems

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Elastic and inelastic neutron scattering has been used to study the continuous structural transition in chloranil at Tc=90.3 K. The transition results in a doubling of the monoclinic unit cell along the c axis and the molecular displacements correspond to a staggered rotation, ϕ, about axes perpendicular to the molecular planes. The temperature dependence of the order parameter, ϕ, has been determined from superlattice Bragg intensities with the result ϕ∝ (Tc−T)0.33±0.02 for 0.005<(1−T/Tc)
    Original languageEnglish
    JournalJournal of Chemical Physics
    Volume67
    Issue number8
    Pages (from-to)3619-3623
    ISSN0021-9606
    DOIs
    Publication statusPublished - 1977

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