Nonlinear dynamics of a dense two-dimensional dipolar exciton gas
arXiv:cond-mat/0508203 · doi:10.1103/PhysRevB.73.033319
Abstract
We use a simple model to describe the nonlinear dynamics of a dense two dimensional dipolar exciton gas. The model predicts an initial fast expansion due to dipole-dipole pressure, followed by a much slower diffusion. The model is in very good agreement with recent experimental results. We show that the dipole pressure induced expansion strongly constrains the time available for achieving and observing Bose-Einstein quantum statistical effects, indicating a need for spatial exciton traps. We also suggest that nonlinear ballistic exciton transport due to the strong internal dipole pressure is readily achievable.
5 pages, 4 figures
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- Room-temperature transport of indirect excitons in (Al,Ga)N/GaN quantum wells
- Transport of dipolar excitons in (Al,Ga)N/GaN quantum wells
- Forming and confining of dipolar excitons by quantizing magnetic fields
- Analysis of Trapped Quantum Degenerate Dipolar Excitons
- Single-photon source over the terahertz regime
- Influence of magnetic quantum confined Stark effect on the spin lifetime of indirect excitons
- Complexity of dipolar exciton Mott transition in GaN/(AlGa)N nanostructures
- Transition from spin-orbit to hyperfine dominated spin relaxation in a cold fluid of dipolar excitons
- Dipolar excitons offer a rich playground for both design of novel optoelectronic devices and fundamental many-body physics