Is the Hofstadter energy spectrum observable in far-infrared absorption?

Details Is the Hofstadter energy spectrum observable in far-infrared absorption? Is the Hofstadter energy spectrum observable in far-infrared absorption?

1996-08-08

arxiv.org/abs/cond-mat/9608045v1

Physics

Condensed Matter

LaTeX, 4 pages with included ps-figures, contribution to the "12th Int. Conf. on the Appl. of High Magnetic fields in Semicond

Scientific paper

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.

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