Excitons in moving lattices

ORAL

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 speed is controlled by the AC frequency. We probed the conveyer speeds from well below to well above the sound velocity. We observed the dynamical localization-delocalization transitions for excitons in the conveyers and measured its dependence on the exciton density and conveyer speed and amplitude. We also developed the theory of exciton transport via conveyers.

–

Authors

  • Jason Leonard

    • University of California at San Diego
    • UC San Diego

  • Alexander Winbow

    • University of California at San Diego

  • Mikas Remeika

    • University of California, San Diego
    • University of California at San Diego

  • Yuliya Kuznetsova

    • University of California at San Diego

  • Alexander High

    • University of California at San Diego

  • Aaron Hammack

    • University of California at San Diego

  • Leonid Butov

    • University of California at San Diego
    • UC San Diego
    • University of California, San Diego

  • Joseph Wilkes

    • Cardiff University

  • Alrun Guenther

    • Cardiff University

  • Alexander Ivanov

    • Cardiff University

  • Micah Hanson

    • University of California at Santa Barbara

  • Arthur Gossard

    • University of California at Santa Barbara