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On the Conductivity Mechanism of Weakly Doped Polyacetylene
Author(s) -
Frankevich E. L.,
Kadyrov D. I.,
Sokolik I. A.,
Pristupa A. I.,
Kobryanskii V. M.,
Zurabyan N. Y.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221320129
Subject(s) - polyacetylene , paramagnetism , polaron , condensed matter physics , conductivity , magnetic field , electron paramagnetic resonance , electrical resistivity and conductivity , materials science , doping , charge carrier , nuclear magnetic resonance , chemistry , electron , physics , quantum mechanics
The decrease of the electrical conductivity of pristine and weakly iodine‐doped polyacetylene, (CH) x , films under the action of an external magnetic field has been revealed. The dependence of the relative decrease of the (CH x ) electrical conductivity in the external dc magnetic field is typical for magnetic field spin effects with participation of pairs of paramagnetic species with spin 1/2. The magnetic electron spin resonance signal detected via the (CH) x electrical conductivity change has been revealed. The dependence of the magnetic field effect on the ac magnetic field frequency (up to 9 kHz) has been measured. A model of the observed phenomenon has been proposed based on the magnetic field effect on the probability of the charge carrier hop in pairs of paramagnetic species “polaron‐defect” in the conjugated chain.