Show simple item record DOHOTARU, Leonid 2019-02-13T10:29:32Z 2019-02-13T10:29:32Z 2018
dc.identifier.citation DOHOTARU, Leonid. Diagrammatic approach for the anderson-holstein model. In: Conferința Tehnico-Științifică a Colaboratorilor, Doctoranzilor și Studenților, Universitatea Tehnică a Moldovei, 16-18 noiembrie, 2017. Chișinău, 2018, vol. 1, pp. 543-544. ISBN 978-9975-45-543-5. ISBN 978-9975-45-544-2 (Vol.1). en_US
dc.identifier.isbn 978-9975-45-543-5
dc.description.abstract We develop a strong-coupling approach to investigate the Anderson-Holstein model with strong repulsion on impurity centers. We derive the relation between electron propagators and correlation functions and prove that for the impurity electrons the latter is identical to the mass operator of the conduction electrons. Strong electron-phonon interaction determines formation of polarons with heavy clouds of phonons surrounding impurity electrons. We demonstrate the existence of a collective excitation mode of these clouds and obtain the dependence of its energy on the hybridization of the impurity with band states. Hybridization is shown to cause softening of the collective mode and its total suppression at sufficiently large values of the hybridization parameter. en_US
dc.language.iso en en_US
dc.publisher Tehnica UTM en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri *
dc.subject strongly correlated electron system en_US
dc.subject Dyson equation en_US
dc.subject Green’s function en_US
dc.subject polaron en_US
dc.subject phonon clouds en_US
dc.title Diagrammatic approach for the anderson-holstein model en_US
dc.type Article en_US

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