The far-infrared absorption of a periodically modulated two-dimensional electron gas in a perpendicular constant magnetic field is calculated self-consistently within the Hartree approximation. For vanishing modulation the magnetoplasmon dispersion shows simple anticrossings with harmonics of the cyclotron resonance, as expected. For increasing modulation we identify intra- and intersubband magnetoplasmon modes charaterized by the number of flux quanta through each unit cell of the periodic potential.
@article{arxiv.cond-mat/9608045,
title = {Is the Hofstadter energy spectrum observable in far-infrared absorption?},
author = {Vidar Gudmundsson and Rolf R. Gerhardts},
journal= {arXiv preprint arXiv:cond-mat/9608045},
year = {2007}
}
Comments
LaTeX, 4 pages with included ps-figures, contribution to the "12th Int. Conf. on the Appl. of High Magnetic fields in Semicond. Physics Wuerzburg 29.07-02.08 1996