Edge magnetoplasmons in the time domain

R. C. Ashoori, H. L. Stormer, L. N. Pfeiffer, K. W. Baldwin, K. West

Research output: Contribution to journalArticlepeer-review

208 Scopus citations

Abstract

We have studied edge magnetoplasmons (EMPs) created by pulses of 100 ps width in a high-mobility two-dimensional electron gas, using a cryogenic transistor. We find that magnetoplasmon motion along the edge occurs only in the direction expected for negatively charged electrons; there is no hint of propagation in the opposite direction expected for positively charged quasiholes. We also measure the periods and decay rates of the edge modes continuously as a function of the magnetic field. From these characteristics we deduce the width of the EMP boundary layer as well as the magnetic-field- dependent momentum-relaxation time.

Original languageEnglish (US)
Pages (from-to)3894-3897
Number of pages4
JournalPhysical Review B
Volume45
Issue number7
DOIs
StatePublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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