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 |
|---|---|
| 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 |
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Keywords
- Exciton Bose-Einstein condensate
- Modulation of the order parameter
- Random exciton potential
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Mathematical Physics
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
- Statistical and Nonlinear Physics
Cite this
Modulation of order parameter of exciton bose-einstein condensate in a ring. / Yang, Sung Ryul; Park, Q Han; Yeo, J.
In: International Journal of Modern Physics B, Vol. 18, No. 27-29, 30.11.2004, p. 3797-3802.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Modulation of order parameter of exciton bose-einstein condensate in a ring
AU - Yang, Sung Ryul
AU - Park, Q Han
AU - Yeo, J.
PY - 2004/11/30
Y1 - 2004/11/30
N2 - 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.
AB - 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.
KW - Exciton Bose-Einstein condensate
KW - Modulation of the order parameter
KW - Random exciton potential
UR - http://www.scopus.com/inward/record.url?scp=17644386857&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=17644386857&partnerID=8YFLogxK
U2 - 10.1142/S0217979204027475
DO - 10.1142/S0217979204027475
M3 - Article
VL - 18
SP - 3797
EP - 3802
JO - International Journal of Modern Physics B
JF - International Journal of Modern Physics B
SN - 0217-9792
IS - 27-29
ER -