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Electrical properties of poly(tetrathiafulvalenes)
Author(s) -
Gruber Harald,
Roth HansKlaus,
Patzsch Jörg,
Fanghänel Egon
Publication year - 1990
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19900370111
Subject(s) - conductivity , electrical resistivity and conductivity , doping , bromine , materials science , thermodynamics , linearity , condensed matter physics , chemistry , analytical chemistry (journal) , physics , organic chemistry , quantum mechanics , metallurgy
Abstract Results of conductivity measurements on undoped and iodine or bromine doped poly(tetrathiafulvalenes) are reported. At higher temperatures the temperature dependence of the d.c. conductivity can be best described by σ d.c. = ° o . exp(T/T o ) 1/4 , typical for variable range hopping. The a.c. conductivity follows the general law °(ω) ∼ ω 2 for frequencies higher than a critical frequency. A description of the frequency dependent conductivity is given by the extended pair approximation (EPA). At lower temperatures a deviation from linearity of the function in σ versus T −1/4 is observed.