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

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.

5 pages, 3 figures

References in corpus (4)

• NMR Determination of 2D Electron Spin Polarization at $\nu =1/2$
• Inelastic Light Scattering by Gap Excitations of Fractional Quantum Hall States at 1/3 <= ν<= 2/3
• Spontaneous Magnetization of Composite Fermions
• A theory of phonon spectroscopy in the fractional quantum Hall regime

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