Low-frequency Raman study of the ferroelectric phase transition in a layered CuCl4-based organic-inorganic hybrid

Antonio Caretta, Rany Miranti, Remco W.A. Havenith, Elia Rampi, Michiel C. Donker, Graeme R. Blake, Matteo Montagnese, Alexey O. Polyakov, Ria Broer, Thomas T.M. Palstra, Paul van Loosdrecht

    Research output: Contribution to journalArticleAcademicpeer-review

    16 Citations (Scopus)

    Abstract

    The ferroelectric phase transition at T-C = 340 K in (C6H5CH2CH2NH3)(2)CuCl4 is studied by means of temperature-dependent low-frequency Raman scattering, focusing on the coupling of a low-energy librational mode to the order parameter of the transition. Analysis of the symmetry and characteristics of this mode links the dipolar order to the tilt angle of the organic cations. The thermal evolution of the Raman spectrum demonstrates the displacive component of the phase transition in combination with order-disorder phenomena and the importance of the organic-inorganic interplay to the physical properties of the compound. The ferroelectric properties investigated here can be generalized to the family of layered organic-inorganic hybrids.
    Original languageEnglish
    Pages (from-to)024301-1-024301-9
    JournalPhysical Review B (Condensed Matter and Materials Physics)
    Volume89
    Issue number2
    DOIs
    Publication statusPublished - 6 Jan 2014

    Keywords

    • X-RAY-DIFFRACTION
    • LATTICE-DYNAMICS
    • ORDER-DISORDER
    • AB-INITIO
    • SOFT-MODE
    • OPTICAL INVESTIGATIONS
    • MAGNETIC MEASUREMENTS
    • NEUTRON-SCATTERING
    • (CH3NH3)2 CDCL4
    • CRYSTAL

    Fingerprint Dive into the research topics of 'Low-frequency Raman study of the ferroelectric phase transition in a layered CuCl4-based organic-inorganic hybrid'. Together they form a unique fingerprint.

  • Cite this

    Caretta, A., Miranti, R., Havenith, R. W. A., Rampi, E., Donker, M. C., Blake, G. R., ... van Loosdrecht, P. (2014). Low-frequency Raman study of the ferroelectric phase transition in a layered CuCl4-based organic-inorganic hybrid. Physical Review B (Condensed Matter and Materials Physics), 89(2), 024301-1-024301-9. https://doi.org/10.1103/PhysRevB.89.024301