Electrostatic Conveyer for Excitons

Details Electrostatic Conveyer for Excitons Electrostatic Conveyer for Excitons

2011-02-25

arxiv.org/abs/1102.5329v1

Phys. Rev. Lett. 106, 196806 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures + supplemental material including two videos

Scientific paper

10.1103/PhysRevLett.106.196806

We report on the study of indirect excitons in moving lattices - conveyers created by a set of AC voltages applied to the electrodes on the sample surface. The wavelength of this moving lattice is set by the electrode periodicity, the amplitude is controlled by the applied voltage, and the velocity is controlled by the AC frequency. We observed the dynamical localization-delocalization transition for excitons in the conveyers and measured its dependence on the exciton density and conveyer amplitude and velocity. We considered a model for exciton transport via conveyers. The theoretical simulations are in agreement with the experimental data.

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