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- W2019945286 abstract "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 are considered. The two different Hamiltonians of a dilute gas of magnetoexcitons with a dipole-dipole repulsion in superlattices, consisting of both QWs and graphene layers (GLs) in the limit of high magnetic field, have been reduced to one effective Hamiltonian---a dilute gas of two-dimensional excitons with the renormalized effective mass of the magnetoexciton, which depends on the magnetic field. This Hamiltonian does not include the vector potential. Moreover, for $N$ excitons we have reduced the problem of $2Nifmmodetimeselsetexttimesfi{}2$-dimensional space onto the problem of $Nifmmodetimeselsetexttimesfi{}2$-dimensional space by integrating over the coordinates of the relative motion of an electron and a hole. The instability of the ground state of the system of interacting two-dimensional indirect magnetoexcitons in a slab of superlattice with alternating electron and hole layers in high magnetic field is found. The stable system of indirect quasi-two-dimensional magnetobiexcitons, consisting of a pair of indirect excitons with opposite dipole moments, is considered. The density of the superfluid component ${n}_{s}(T)$ 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 the QW and graphene realizations." @default.
- W2019945286 created "2016-06-24" @default.
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- W2019945286 date "2008-07-30" @default.
- W2019945286 modified "2023-09-28" @default.
- W2019945286 title "Collective properties of magnetobiexcitons in quantum wells and graphene superlattices" @default.
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- W2019945286 doi "https://doi.org/10.1103/physrevb.78.035135" @default.
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