Instability of dipole magnetoexcitons in quantum wells' and graphene superlattices |
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Authors: | Oleg L Berman Yurii E Lozovik |
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Institution: | a Physics Department, New York City College of Technology, The City University of New York, Brooklyn, NY 11201, USA b Institute of Spectroscopy, Russian Academy of Sciences, 142190 Troitsk, Moscow Region, Russia |
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Abstract: | We propose the Bose-Einstein condensation and superfluidity of quasi-two-dimensional spatially indirect magnetobiexcitons in a slab of superlattice with alternating electron and hole layers consisting from the semiconducting quantum wells (QWs) and graphene superlattice in high magnetic field. For this system the instability of the ground state of interacting two-dimensional indirect magnetoexcitons in a slab of superlattice with alternating electron and hole layers in high magnetic field is found. The density of superfluid component ns(T) and the temperature of the Kosterlitz-Thouless phase transition to the superfluid state in the system of two-dimensional indirect magnetobiexcitons, interacting as electrical quadrupoles, are obtained for both QW and graphene realizations. |
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Keywords: | 71 35 Ji 71 35 Lk 71 35 -y 68 65 Cd 73 21 Cd |
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