X-ray diffuse scattering and magnetic resonance: a study of structural phase transitions in perylene radical cation salts

The quasi-one-dimensional organic conductors di-perylene hexafluorophosphate and -antimonate undergo three and two structural phase transitions below room temperature, respectively. The unequivocal structural proof of the Peierls transition at T p in both compounds is provided by X-ray diffuse scatt...

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Bibliographic Details
Published in:Synthetic metals 2000, Vol.108 (1), p.21-26
Main Authors: Buschhaus, Carsten, Moret, Roger, Ravy, Sylvain, Dormann, Elmar
Format: Article
Language:English
Subjects:
Condensed Matter
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Crystallographic aspects of phase transformations
pressure effects
Electron states
Exact sciences and technology
Materials Science
Metal-insulator transitions and other electronic transitions
Peierls transition
Physics
Quasi-one-dimensional conductors
Structural properties
Structure of solids and liquids
crystallography
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Summary:The quasi-one-dimensional organic conductors di-perylene hexafluorophosphate and -antimonate undergo three and two structural phase transitions below room temperature, respectively. The unequivocal structural proof of the Peierls transition at T p in both compounds is provided by X-ray diffuse scattering experiments. The characterization of the structural phase transitions above T p is done using the analysis of X-ray patterns together with previously known ESR results. The combined techniques offer new insight into the relative displacements and rotations of the perylene stacks. The relationship between the Peierls transition and the precursor transitions is discussed.
ISSN:0379-6779
1879-3290
DOI:10.1016/S0379-6779(99)00157-5