Inelastic light scattering by collective excitations in the fractional quantum Hall regime

Moonsoo Kang, A. Pinczuk, B. S. Dennis, M. A. Eriksson, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

We report an inelastic light scattering study of long wavelength collective gap excitations of fractional quantum Hall (FQH) states at ν = p/(2p+1) for 1/3≤v≤2/3. The ν-dependence of the gap energy suggests a collapse of the collective excitation gap near ν = 1/2 . In a range of filling factors close to ν = 1/2 , where the FQH gap is believed to collapse, we observe a collective excitation mode that exists only at temperatures below 150 mK.

Original languageEnglish (US)
Pages (from-to)69-71
Number of pages3
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume6
Issue number1
DOIs
StatePublished - Feb 2000
Externally publishedYes
Event13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can
Duration: Aug 1 1999Aug 6 1999

All Science Journal Classification (ASJC) codes

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

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