Observation of the logarithmic dispersion of high frequency edge excitations
arXiv:cond-mat/9702110 · doi:10.1103/PhysRevB.55.R13397
Abstract
We report phase sensitive measurements of microwave propagation through a high mobility two dimensional electron gas subjected to a perpendicular magnetic field. Two types of configurations were used, one that allows all wave vectors q, and one that selects only specific q values. The spectrum of edge excitations was studied over a broad frequency span, which allowed us to observe the logarithmic dispersion of edge magneto-plasmons.
12 pages, Postscript only, 4 Postscript figures