Abstract
We have studied theoretically the Bose-Einstein condensation (BEC) of two-dimensional excitons in a ring with a random variation of the effective exciton potential along the circumference. We derive a nonlinear Gross-Pitaevkii equation (GPE) for such a condensate, which is valid even in the presence of a weak magnetic field. For several types of the random potentials our numerical solution of the ground state of the GPE displays a necklace-like structure. This is a consequence of the interplay between the random potential and a strong nonlinear repulsive term of the GPE. We have investigated how the mean distance between modulation peaks depends on properties of the random potentials.
Original language | English |
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Pages (from-to) | 3797-3802 |
Number of pages | 6 |
Journal | International Journal of Modern Physics B |
Volume | 18 |
Issue number | 27-29 |
DOIs | |
Publication status | Published - 2004 Nov 30 |
Keywords
- Exciton Bose-Einstein condensate
- Modulation of the order parameter
- Random exciton potential
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Condensed Matter Physics