Polarized Absorption in Oriented 'New' (CH)x

Abstract

We have measured the temperature and polarization dependence of the infrared absorption in 500%-stretched highly-conducting trans-(CH)x, doped chemically with iodine to levels up to 6% (I3). These samples have highly anisotropic infrared conductivity, with substantially greater sigma 1(omega) for polarization parallel to the chain direction. The 300 K frequency-dependent conductivity has a narrow Drude-like peak at zero frequency above which is a broad 'midgap' band with the usual doping-induced vibrational modes superimposed. When the temperature was lowered, the far-ir conductivity decreased (in accord with dc measurements). The Drude-like peak was not seen below 200 K.

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Document Details

Document Type
Technical Report
Publication Date
Mar 18, 1991
Accession Number
ADA234049

Entities

People

  • A. G. Macdiarmid
  • David B. Tanner
  • H. S. Woo
  • N. Theophilou

Organizations

  • University of Pennsylvania

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  • Absorption
  • Absorption Coefficients
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Fields of Study

  • Materials science
  • Physics

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  • Materials Science and Engineering.