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Fononii оn apropierea tranziţiei de fază peierls оn cristale organice cvasiunidimensionale

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dc.contributor.author ANDRONIC, Silvia
dc.contributor.author CASIAN, Anatolie
dc.date.accessioned 2019-12-06T07:50:38Z
dc.date.available 2019-12-06T07:50:38Z
dc.date.issued 2012
dc.identifier.citation ANDRONIC, Silvia, CASIAN, Anatolie. Fononii оn apropierea tranziţiei de fază peierls оn cristale organice cvasiunidimensionale. In: Telecommunications, Electronics and Informatics- ICTEI 2012: proc. of the 5th intern. conf., Technical University of Moldova, May 11-13, 2012. Chișinău, 2012, Vol. 1, pp. 258-261. ISBN 978-9975-45-082-9. en_US
dc.identifier.isbn 978-9975-45-082-9
dc.identifier.uri http://repository.utm.md/handle/5014/7319
dc.description.abstract Many quasi-one-dimensional organic crystals, known as synthetic metals at room temperature, become insulators when the temperature decreases, due to a Peierls transition. In the crystals withhalf filled conduction band the dimerization of lattice takes place at some critical temperature that determines the phase transition. The equation for phonon Green function is deduced in the random phase approximation as a sum of diagrammatic ladder series of close loops of electronicGreen functions. A more complete crystal model is used which takes into account two main electron-phonon interactions. The dispersion equation for renormalized phonons is obtained and the polarization operator is calculated. The phonon spectra in dependence of temperature and crystal parameters are modeled. The critical temperature of transition is calculated. en_US
dc.language.iso ro en_US
dc.publisher Technical University of Moldova en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject tranziţia Peierls en_US
dc.subject fononi en_US
dc.subject cristale cvasiunidimensionale en_US
dc.subject cristale organice en_US
dc.subject funcţii Green en_US
dc.subject polarizare en_US
dc.title Fononii оn apropierea tranziţiei de fază peierls оn cristale organice cvasiunidimensionale en_US
dc.type Article en_US


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