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| Articolul precedent |
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 SM ISO690:2012MOSKALENKO, Sveatoslav, LIBERMAN, Michael, BOŢAN, V., SNOKE, David W.. Coexistence of two Bose-Einstein condensates of two-dimensional magnetoexcitons. Exciton-plasmon collective elementary excitations. In: Solid State Communications, 2005, vol. 134, pp. 23-26. ISSN 0038-1098. DOI: https://doi.org/10.1016/j.ssc.2004.09.065 |
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  Solid State Communications |
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| Volumul 134 / 2005 / ISSN 0038-1098 /ISSNe 1879-2766 | ||||||
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| DOI:https://doi.org/10.1016/j.ssc.2004.09.065 | ||||||
| Pag. 23-26 | ||||||
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Possibility of the Bose-Einstein condensation of magnetic excitons in an ideal two-dimensional system in a strong perpendicular magnetic field is investigated theoretically taking into account the influence of virtual transitions to the excited Landau levels and Anderson-type coherent excited states. It was understood, that the Bose-Einstein condensed (BEC-ed) magnetoexcitons with considerable wave vector K and motional dipole moment Kl2, where l is the magnetic length, can form the droplets of the metastable dielectric liquid phase, whereas the BEC-ed magnetoexcitons with K =0 can form a stable degenerate Bose-gas surrounding the droplet. We have shown that collective elementary excitations of the BEC of excitons are mixed with plasma oscillations of the electron-hole system in the presence of strong perpendicular magnetic field. Their mutual influence is determined by the coherence factor and essentially depends on the condensate wave vector K. |
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| Cuvinte-cheie D. Bose-Einstein condensation, D. Magnetoexcitons |
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