3d modeling of the peierls transition in TTF-TCNQ organic crystals
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Proprietăţile şi structura sistemelor moleculare (222)
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ANDRONIC, Silvia. 3d modeling of the peierls transition in TTF-TCNQ organic crystals. In: Moldavian Journal of the Physical Sciences, 2015, nr. 1-2(14), pp. 96-101. ISSN 1810-648X.
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Moldavian Journal of the Physical Sciences
Numărul 1-2(14) / 2015 / ISSN 1810-648X /ISSNe 2537-6365

3d modeling of the peierls transition in TTF-TCNQ organic crystals
CZU: 539.2

Pag. 96-101

Andronic Silvia
 
Technical University of Moldova
 
Disponibil în IBN: 12 martie 2016


Rezumat

The Peierls structural transition in quasi-one-dimensional (Q1D) TTF-TCNQ organic crystals of is studied in the 3D approximation. Two the most important electronphonon interactions are considered. The analytic expression for the phonon polarization operator is obtained in the random phase approximation. The polarization operator as a function of temperature is determined for different values of dimensionless Fermi momentum kF. Different cases are analyzed: kF = 0.59/2 and where the carrier concentration varies and kF = 0.59/2 ± δ, where δ represents the variation of Fermi momentum kF. In all cases, Peierls critical temperature Tp is determined.