Magneto-roton excitation of fractional quantum Hall effect: Comparison between theory and experiment

Details Magneto-roton excitation of fractional quantum Hall effect: Comparison between theory and experiment Magneto-roton excitation of fractional quantum Hall effect: Comparison between theory and experiment

1999-10-29

arxiv.org/abs/cond-mat/9910491v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

A major obstacle toward a {\em quantitative} verification, by comparison to experiment, of the theory of the excitations of the fractional quantum Hall effect has been the lack of a proper understanding of disorder. We circumvent this problem by studying the {\em neutral} magneto-roton excitations, whose energy is expected to be largely insensitive to disorder. The calculated energies of the roton at 1/3, 2/5 and 3/7 fillings of the lowest Landau level are in good agreement with those measured experimentally.

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