Light scattering by magnetorotons of collective excitations in the fractional quantum Hall regime

Moonsoo Kang, A. Pinczuk, I. Dujovne, B. S. Dennis, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalConference articlepeer-review

Abstract

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 ν = 2/5, while a single deep minimum is resolved at ν = 1/3. The results support Chern-Simons and composite fermion calculations that predict multiple roton minima for states with ν > 1/3.

Original languageEnglish (US)
Pages (from-to)55-58
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume12
Issue number1-4
DOIs
StatePublished - Jan 2002
Externally publishedYes
Event14th International Conference on the - Prague, Czech Republic
Duration: Jul 30 2001Aug 3 2001

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Keywords

  • Collective excitation
  • Fractional quantum Hall effect
  • Inelastic light scattering

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