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Collective phenomena in multi - band superconducting systems doped with non magnetic impurity

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dc.contributor.author CALALB, Mihai
dc.contributor.author CALALB, Liliana
dc.date.accessioned 2019-12-05T14:14:46Z
dc.date.available 2019-12-05T14:14:46Z
dc.date.issued 2012
dc.identifier.citation CALALB, Mihai, CALALB, Liliana. Collective phenomena in multi - band superconducting systems doped with non magnetic impurity. 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. 232-234. ISBN 978-9975-45-082-9. en_US
dc.identifier.isbn 978-9975-45-082-9
dc.identifier.uri http://repository.utm.md/handle/5014/7313
dc.description.abstract The overlapping of energy bands on the Fermi surface changes the properties of multi – band superconductors as qualitatively as well quantitatively. Here we investigate the appearance of collective oscillations caused by phase fluctuations of order parameters from different bands. Namely, how non- magnetic chaotic distributed impurity influences on the collective oscillations in two – band superconductors. Two – particle Green function is considered and the system for vertex functions averaged on chaotic distributed impurity are obtained using the Hamiltonian of two – band superconductors. Necessary values to determine the frequency of collective oscillations ω are calculated in linear approximation after the impurity concentration. The equation for ω is obtained and its solutions are found. It is shown that in this doped system an exciton – like frequency of collective oscillations could arise. At low impurity concentration the damping of collective oscillations is absent. en_US
dc.language.iso en 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 collective oscillations en_US
dc.subject oscillations en_US
dc.subject many–band superconductors en_US
dc.subject superconductors en_US
dc.subject non–magnetic impurity en_US
dc.title Collective phenomena in multi - band superconducting systems doped with non magnetic impurity en_US
dc.type Article en_US


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