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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
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.