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

Vito W. Scarola·Kwon Park·Jainendra K. Jain
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Abstract

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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Vito W. Scarola, Kwon Park, Jainendra K. Jain. 1999-10-29. Magneto-roton excitation of fractional quantum Hall effect: Comparison between theory and experiment. https://doi.org/10.1103/physrevb.61.13064

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