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.
Bibliographical noteFunding Information:
We wish to acknowledge useful discussions with D. Orgad, and comments from V.I. Talyanskii and G. Ernst. This work was supported by the Israel Science Foundation founded by the Israeli Academy of Science and Humanities.
- Edge magnetoplasmon
- Integer quantum Hall effect