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Dielectric Response of Some Semiconducting TCNQ Salts in the Submillimetre Range
Author(s) -
Gorshunov B. P.,
Kozlov G. V.,
Volkov A. A.,
Petzelt J.,
Železný V.
Publication year - 1986
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.2221380136
Subject(s) - conductivity , perpendicular , dielectric , polarization (electrochemistry) , spectral line , condensed matter physics , materials science , relaxation (psychology) , permittivity , dielectric permittivity , dielectric response , electrical resistivity and conductivity , atmospheric temperature range , molecular physics , chemistry , optoelectronics , physics , thermodynamics , quantum mechanics , psychology , social psychology , geometry , mathematics
The complex permittivity spectra of the semiconducting salts MTPA(TCNQ) 2 , MTPP(TCNQ) 2 and of the semiconducting phases of MEM(TCNQ) 2 are measured for the first time in the 8 to 30 cm −1 range and in the temperature interval 5 to 350 K for polarization parallel and perpendicular to the conducting stacks. In the case of parallel polarization the model of interrupted conducting strands is used to assign the spectra, where individual tetramers are taken as the strands. In the case of perpendicular polarization the conductivity spectra can be understood as due to hopping conductivity with a broad distribution of relaxation times.