Metal-Insulator Transition of Peierls Type in TTT2I3 Crystals in 3D Approximation
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2019-02-28 15:21
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ANDRONIC, Silvia, BALMUŞ, Ion, KASIYAN, Anatolie. Metal-Insulator Transition of Peierls Type in TTT2I3 Crystals in 3D Approximation. In: Microelectronics and Computer Science, Ed. 9, 19-21 octombrie 2017, Chisinau. Chișinău, Republica Moldova: Universitatea Tehnică a Moldovei, 2017, Ediția 9, pp. 539-542. ISBN 978-9975-4264-8-0.
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Microelectronics and Computer Science
Ediția 9, 2017
Conferința "Microelectronics and Computer Science"
9, Chisinau, Moldova, 19-21 octombrie 2017

Metal-Insulator Transition of Peierls Type in TTT2I3 Crystals in 3D Approximation


Pag. 539-542

Andronic Silvia, Balmuş Ion, Kasiyan Anatolie
 
Technical University of Moldova
 
Disponibil în IBN: 2 noiembrie 2017


Rezumat

The metal-insulator transition in quasi-one-dimensional organic crystals of tetrathiotetraceneiodide, TTT2I3, is investigated in 3D approximation. A more complete physical model of the crystal is applied which takes into account two the most important hole-phonon interaction mechanisms. The first is similar to that of deformation potential and the second one is of polaron type. The scattering on defects is also considered. The phonon polarization operator and the renormalized phonon spectrum are calculated in the random phase approximation for different temperatures applying the method of retarded Green functions. The effect of lattice distortion on the dispersion of renormalized acoustic phonons is analyzed. The Peierls critical temperature is determined.

Cuvinte-cheie
Peierls transition, quasi-one-dimensional organic crystals, polarization operator, renormalized phonon spectrum,

tetrathiotetracene-iodide crystals