Time-resolved imaging of the boundary excitations of a two-dimensional electron gas in a magnetic field

Authors
Shashkin, AA Kent, AJ Hawker, P Henini, M
Citation
Aa. Shashkin et al., Time-resolved imaging of the boundary excitations of a two-dimensional electron gas in a magnetic field, PHYS REV B, 60(24), 1999, pp. R16307-R16310
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
24
Year of publication
1999
Pages
R16307 - R16310
Database
ISI
SICI code
0163-1829(199912)60:24<R16307:TIOTBE>2.0.ZU;2-3
Abstract
We use a time-resolved imaging technique with pulsed-laser induced perturba tion to study the excitation dynamics of a two-dimensional electron gas in a AlxGa1-xAs/GaAs heterostructure under an applied magnetic field. The velo city of the optically generated boundary excitations is found to be much sm aller than the expected edge magnetoplasmon velocities. We interpret the ex perimental results in terms of theoretically ;predicted acoustic boundary m odes [I. L. Aleiner and L. I. Glazman, Phys. Rev. Lett. 72, 2935 (1994)]. [ S0163-1829(99)50348-2].