| Issue |
EPL
Volume 87, Number 2, July 2009
|
|
|---|---|---|
| Article Number | 27010 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/87/27010 | |
| Published online | 18 August 2009 | |
Correlations in a two-dimensional Bose gas with long-range interaction
Racah Institute of Physics, Hebrew University - Jerusalem 91904, Israel
Corresponding author: boris@cc.huji.ac.il
Received:
11
May
2009
Accepted:
15
July
2009
We study the correlations of two-dimensional dipolar bosons with excitons in semiconductor bilayers as a specific case, in the whole temperature-concentration region. We show that at low concentrations, the Bose degeneracy is accompanied by strong multi-particle correlations and the system behaves as a Bose liquid. At high concentrations the repulsion suppresses quantum coherence and the system behaves as a classical liquid down to a temperature lower than typical for a Bose gas. The interaction energy of the particles is a sensitive tool for a measurement of the correlations. This theory can apply to other systems of bosons with extended interaction.
PACS: 71.35.Lk – Collective effects (Bose effects, phase space filling, and excitonic phase transitions) / 05.30.Jp – Boson systems / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EPLA, 2009
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