Quantum Signature Blurred by Disorder in Indirect Exciton Gases
arXiv:1101.1023 · doi:10.1209/0295-5075/93/17007
Abstract
The photoluminescence dynamics of a microscopic gas of indirect excitons trapped in coupled quantum wells is probed at very low bath temperature (approximately 350 mK). Our experiments reveal the non linear energy relaxation characteristics of indirect excitons. Particularly, we observe that the excitons dynamics is strongly correlated with the screening of structural disorder by repulsive exciton-exciton interactions. For our experiments where two-dimensional excitonic states are gradually defined, the distinctive enhancement of the exciton scattering rate towards lowest energy states with increasing density does not reveal unambiguously quantum statistical effects such as Bose stimulation.
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Cited by in corpus (10)
- Transport of Indirect Excitons in a Potential Energy Gradient
- Room-temperature transport of indirect excitons in (Al,Ga)N/GaN quantum wells
- Transport of dipolar excitons in (Al,Ga)N/GaN quantum wells
- Pattern Formation in the Exciton Inner Ring
- Indirect excitons in a potential energy landscape created by a perforated electrode
- Excitation Energy Dependence of the Exciton Inner Ring
- Anisotropic superfluidity of two-dimensional excitons in a periodic potential
- Spatially and time-resolved imaging of transport of indirect excitons in high magnetic fields
- A Microscopic Lattice for Two-dimensional Dipolar Excitons
- Coherent exciton transport in semiconductors