True, quasi and unstable Nambu–Goldstone modes of the two-dimensional Bose–Einstein condensed magnetoexcitons

• Published in: Solid state communications Vol. 155; pp. 57 - 61
• Main Authors: Moskalenko, S.A., Liberman, M.A., Snoke, D.W., Dumanov, E.V., Rusu, S.S., Cerbu, F.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2013
• Subjects: A. Magnetoexciton; D. Bose-Einstein condensation; D. Bose–Einstein condensation; A. Magnetoexciton

The collective elementary excitations of two-dimensional magnetoexcitons in a Bose–Einstein condensate (BEC) with wave vector k→=0 were investigated in the framework of the Bogoliubov theory of quasi-averages. The Hamiltonian of the electrons and holes lying in the lowest Landau levels (LLLs) contai...