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Study at 10 8 and 2 × 10 8 Hz of the Electrical Conductivity and Dielectric Constant of the Highly Anisotropic Organic Semiconductor TEA (TCNQ) 2
Author(s) -
Farges J. P.,
Brau A.
Publication year - 1974
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.2220610233
Subject(s) - dielectric , electrical resistivity and conductivity , condensed matter physics , conductivity , anisotropy , dispersion (optics) , semiconductor , materials science , thermal conduction , permittivity , range (aeronautics) , band gap , analytical chemistry (journal) , chemistry , physics , optics , optoelectronics , composite material , chromatography , quantum mechanics
The ac electrical conductivity and anisotropy, including an evaluation of the dielectric constant, at 10 8 and 2 × 10 8 Hz in the range 77 to 350°K is investigated. A hopping mechanism is evidenced from the dispersion of conductivity observed below 200°K, and is associated with the existence of tails of localized states at the edges of a band gap. The vanishing dispersion in the upper temperature range is likely to indicate that an interband transition process may then become important for conduction.