Accession Number : ADA298638

Title :   Metallic Microwave Dielectric Response of Polyacetylene.

Descriptive Note : Technical rept.,

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS

Personal Author(s) : Joo, J. ; Du, G. ; Prigondin, V. N. ; Tsukamoto, J. ; Epstein, A. J.

PDF Url : ADA298638

Report Date : 09 AUG 1995

Pagination or Media Count : 18

Abstract : Using dielectric constant and conductivity at microwave frequency, we study the differences between highly conducting polyacetylenes and standard metals. We report that the microwave dielectric constant at room temperature for heavily-iodine doped Tsukamoto polyacetylene films is negative and of record size. This demonstrates that the highly conducting state is metallic despite the decrease in conductivity with decreasing temperature. The anomalously long transport time is attributed to suppression of both phonon and impurity backward scattering in a structure with an open Fermi surface. We analyze the temperature dependent data using a model of three-dimensional metallic fiber segments coupled by weak links within which one-dimensional localization effects occur. jg p.3

Descriptors :   *METALS, *POLYMERS, *DIELECTRICS, *MICROWAVES, *ACETYLENES, CONDUCTIVITY, BACKSCATTERING, FERMI SURFACES, IMPURITIES, ROOM TEMPERATURE, THREE DIMENSIONAL, DIELECTRIC PROPERTIES, RESPONSE, CONSTANTS, POLYMERIC FILMS, TRANSPORT, IODINE, DOPING, PHONONS, MICROWAVE FREQUENCY, METAL FIBERS.

Subject Categories : Polymer Chemistry
      Inorganic Chemistry
      Organic Chemistry
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE