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Collective Elementary Excitations of 2D Magnetoexcitons Taking Into Account Excited Landau levels

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dc.contributor.author MOSKALENKO, S. A.
dc.contributor.author LIBERMAN, M. A.
dc.contributor.author DUMANOV, E. V.
dc.contributor.author RUSU, S.
dc.contributor.author CERBU, F.
dc.date.accessioned 2019-10-22T11:54:46Z
dc.date.available 2019-10-22T11:54:46Z
dc.date.issued 2011
dc.identifier.citation MOSKALENKO, S. A., LIBERMAN, M. A., DUMANOV, E. V. et al. Collective Elementary Excitations of 2D Magnetoexcitons Taking Into Account Excited Landau levels. In: ICNBME-2011. International conference on Nanotechnologies and Biomedical Engineering. German-moldovan workshop on Novel Nanomaterials for Electronic, Photonic and Biomedical Applications: proc. of the intern. conf., July 7-8, 2011. Chişinău, 2011, pp. 60-65. ISBN 978-9975-66-239-0. en_US
dc.identifier.isbn 978-9975-66-239-0
dc.identifier.uri http://repository.utm.md/handle/5014/5019
dc.description.abstract The collective elementary excitations of the two-dimensional magnetoexcitons in a state of Bose- Einstein condensation (BEC) with wave vector k 0 were investigated in the frame of the Bogoliubov theory of quasiaverages. The starting Hamiltonian of the electrons and holes lying on the lowest Landau levels (LLLs) contains the supplementary interactions due to the virtual quantum transitions of the particles to the excited Landau levels (ELLs) and return back. As a result the interaction between the magnetoexcitons with k 0 does not vanish and their BEC becomes stable as regards the collapse. The energy spectrum of the collective elementary excitations consists from two exciton-type branches (energy and quasienergy branches) each of them with energy gap and roton-type section, from the gapless optical plasmon branch and from the acoustical plasmon branch, which reveals the absolute instability in the range of small wave vectors. 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 Bose-Einstein condensation en_US
dc.subject elementary excitations en_US
dc.subject magnetoexcitons en_US
dc.subject plasmons en_US
dc.subject excitations en_US
dc.title Collective Elementary Excitations of 2D Magnetoexcitons Taking Into Account Excited Landau levels en_US
dc.type Article en_US


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