Bose-Einstein condensation and superfluidity of magnetobiexcitons in quantum wells' and graphene superlattices
| dc.creator | Berman, Oleg L. | |
| dc.creator | Kezerashvili, Roman Ya. | |
| dc.creator | Lozovik, Yurii E. | |
| dc.date | 2007-11-06 | |
| dc.date.accessioned | 2026-07-07T08:41:16Z | |
| dc.date.available | 2026-07-07T08:41:16Z | |
| dc.description | We propose the Bose-Einstein condensation (BEC) and superfluidity of quasi-two-dimensional (2D) 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. The two different Hamiltonians of a dilute gas of magnetoexcitons with a dipole-dipole repulsion in superlattices consisting of both QWs and graphene layers in the limit of high magnetic field have been reduced to one effective Hamiltonian a dilute gas of two-dimensional excitons without magnetic field. Moreover, for $N$ excitons we have reduced the problem of $2N\times 2$ dimensional space onto the problem of $N\times 2$ dimensional space by integrating over the coordinates of the relative motion of an electron (e) and a hole (h). 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 established. The stable system of indirect quasi-two-dimensional magnetobiexcitons, consisting of pair of indirect excitons with opposite dipole moments is considered. The density of 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 QW and graphene realizations. | |
| dc.description | 4 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/0711.0976 | |
| dc.identifier | http://arxiv.org/abs/0711.0976 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/141626 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Bose-Einstein condensation and superfluidity of magnetobiexcitons in quantum wells' and graphene superlattices | |
| dc.type | text |