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X-ray scattering of TSeF-TCNQ and HMTSeF-TCNQ

  • C. Weyl
  • E.M. Engler
  • K. Bechgaard
  • G. Jehanno
  • S. Etemad
V. Experimental Investigations on TTF-TCNQ and its Derivatives
Part of the Lecture Notes in Physics book series (LNP, volume 65)

Abstract

Some results of a X-ray diffuse scattering investigation on the charge transfer compounds TSeF-TCNQ and HMTSeF-TCNQ are presented. In the metallic state the results show the formation of a 1-D distortion or a Kohn anomaly in the phonon spectrum. For TSeF-TCNIQ this is observed below T~238 K and corresponds to a periodicity of (3.15± 0.05) \(\overrightarrow {\left| b \right|}\) along the chain axis. For HMFSeF-TCNQ the distortion was detected even at room temperature and has a period of(2.7± 0.1) \(\overrightarrow {\left| c \right|}\). In both materials the distortion has both transverse components. In the insulating state of TSeF-TGVQ below 29 K the 1-D distortion on each stack are correlated to form a 3-D super-lattice.

Keywords

Charge Transfer Transverse Component Phonon Spectrum Metallic State Organic Conductor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Akadémiai Kiadó 1977

Authors and Affiliations

  • C. Weyl
    • 1
  • E.M. Engler
    • 2
  • K. Bechgaard
    • 3
  • G. Jehanno
    • 4
  • S. Etemad
    • 5
  1. 1.Laboratoire de Physique des SolidesUniversité Paris-SudOrsayFrance
  2. 2.IBM Thomas Watson Research CenterYorktown HeightsUSA
  3. 3.H.C. Oersted InstituteUniversitetsparken 5CopenhagenDenmark
  4. 4.Service de Physique du Solide et de Résonance MagnétiqueCentre d'Etudes Nucléaires de SaclayGif-sur-YvetteFrance
  5. 5.Department of PhysicsAria-Mehr UniversityTehranIran

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