Moving Beyond a Simple Model of Luminescence Rings in Quantum Well Structures

Details Moving Beyond a Simple Model of Luminescence Rings in Quantum Well Structures Moving Beyond a Simple Model of Luminescence Rings in Quantum Well Structures

2004-06-05

arxiv.org/abs/cond-mat/0406141v1

Physics

Condensed Matter

Other Condensed Matter

8 pages, 5 figures

Scientific paper

10.1088/0953-8984/16/35/004

The dramatic appearance of luminescence rings with radius of several hundred microns in quantum well structures can be understood through a fairly simple nonlinear model of the diffusion and recombination of electrons and holes in a driven nonequilibrium system. The ring corresponds to the boundary between a positive hole gas and a negative electron gas in steady state. While this basic effect is now well understood, we discuss several other experimental results which can not be explained by this simple model.

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