Electrostatic Conveyer for Excitons
A. G. Winbow, J. R. Leonard, M. Remeika, Y. Y. Kuznetsova, A. A. High,, A. T. Hammack, L. V. Butov, J. Wilkes, A. A. Guenther, A. L. Ivanov, M., Hanson, A. C. Gossard
TL;DR
This paper investigates the transport of indirect excitons in electrostatic conveyers, demonstrating a localization-delocalization transition influenced by lattice parameters and exciton density, supported by experimental and theoretical analysis.
Contribution
It introduces a controllable electrostatic conveyer system for excitons and models their transport, showing agreement between theory and experiment.
Findings
Observation of localization-delocalization transition in exciton transport
Dependence of transition on exciton density and conveyer parameters
Theoretical model aligns with experimental results
Abstract
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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