Abstract
In arrays of quantum dots and antidots we observe, with far-infrared spectroscopy for increasing magnetic field, huge (up to 20%) oscillations of the resonance frequency of the edge-magnetoplasmon-like mode. At fully occupied Landau levels the frequency has a maximum for the dots, and the reverse behavior, a minimum, for the antidots. We show that this is caused by the formation of compressible and incompressible stripes at the edges of the dots and antidots.
- Received 14 September 1995
DOI:https://doi.org/10.1103/PhysRevLett.76.2774
©1996 American Physical Society