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The conduction mechanism of the crystals of tetracyanoquinodimethan (TCNQ) anion radical salts is studied. Unpaired π-electrons in TCNQ - anions are described by the Hubbard model with a narrow band and one electron per molecular site. The electronic spectra of the Hubbard model are determined by the Hubbard's third solution. The value of the electrical conductivity of TEA(TCNQ) 2 at 23°C agrees with experimental values quantitatively.
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Yukio Suezaki (1973) studied this question.
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