Magnetorotons in the dispersion curves of collective gap excitation modes of fractional quantum Hall liquids are measured by resonant inelastic light scattering. Two deep magnetoroton minima are observed at = 2 5 , while a single deep minimum is resolved at = 1 3 . The results support Chern-Simons a
Inelastic light scattering by collective excitations in the fractional quantum Hall regime
β Scribed by Moonsoo Kang; A. Pinczuk; B.S. Dennis; M.A. Eriksson; L.N. Pfeiffer; K.W. West
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 90 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1386-9477
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π SIMILAR VOLUMES
Resonant inelastic light scattering experiments access the low lying excitations of electron liquids in the fractional quantum Hall regime in the range 2=5 $ n $ 1=3: Modes associated with changes in the charge and spin degrees of freedom are measured. Spectra of spin reversed excitations at filling
Strong resonant enhancements of inelastic light scattering from the long wavelength inter-Landau level magnetoplasmon and the intra-Landau level spin wave excitations are seen for the fractional quantum Hall state at n ΒΌ 1=3: The energies of the sharp peaks (FWHM 0.2 meV) in the profiles of resonant