Optical properties of hexamethylene-tetraselenafulvalinium tetracyanoquinodi-methanide (HMTSF-TCNQ)

  • C. S. Jacobsen
  • K. Bechgaard
  • J. R. Andersen
V. Experimental Investigations on TTF-TCNQ and its Derivatives
Part of the Lecture Notes in Physics book series (LNP, volume 65)


Polarized single crystal reflectance studies of HMTSF-TCNQ are presented. One reflectance component perpendicular to the highly conducting direction is flat and rather low, the other shows a transition at ω = 16000 cm−1, much stronger than usually seen in conducting TCNQ salts. The highly conducting direction displays a plasma edge. An analysis yields a plasmon frequency ωp = 7400 cm−1, an inverse life time λ = 1300 cm−1, and an optical mass m* = 1.9 mo. The low-temperature reflectance gives ωp = 8200 cm−1 and a 2.4 times longer lifetime, consistent with the temperature dependence of the do conductivity.


Optical Conductivity Charge Density Wave Plasma Edge Plasmon Frequency Temperature Reflectance 
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Copyright information

© Akadémiai Kiadó 1977

Authors and Affiliations

  • C. S. Jacobsen
    • 1
  • K. Bechgaard
    • 2
  • J. R. Andersen
    • 3
  1. 1.Physics Laboratory IIITechnical University of DenmarkLyngbyDenmark
  2. 2.H.C. Ørsted InstituteDenmark
  3. 3.Chemistry DepartmentRisøDenmark

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