Phonon excitations of composite-fermion Landau levels

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  • Radboud University Nijmegen (RU)
  • Ruhr-Universität Bochum
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Original languageEnglish
Pages (from-to)26801
Number of pages1
JournalPhysical review letters
Volume93
Issue number2
Publication statusPublished - 9 Jul 2004

Abstract

The phonon excitations of fractional quantum Hall (FQH) states at filling factors ν =1÷3,2÷5, 4÷7, 3÷5, 4÷3, and 5÷3 were investigated. The excitations were found to be based on Landau-level transitions of composite fermions (CF). It was observed that at filling factor ν = 2÷3, a linear field dependence of the excitation energy in the high field regime showed a spin transition, which was excited by the phonons. All the transport gaps, except the one measured at ν = 2÷3, were found to be lower than the phonon excitation gaps due to disorder effects and because temperature was also coupled to spin flip excitations.

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Phonon excitations of composite-fermion Landau levels. / Schulze-Wischeler, F.; Hohls, F.; Zeitler, U. et al.
In: Physical review letters, Vol. 93, No. 2, 09.07.2004, p. 26801.

Research output: Contribution to journalArticleResearchpeer review

Schulze-Wischeler F, Hohls F, Zeitler U, Reuter D, Wieck AD, Haug RJ. Phonon excitations of composite-fermion Landau levels. Physical review letters. 2004 Jul 9;93(2):26801. doi: 10.1103/PhysRevLett.93.026801
Schulze-Wischeler, F. ; Hohls, F. ; Zeitler, U. et al. / Phonon excitations of composite-fermion Landau levels. In: Physical review letters. 2004 ; Vol. 93, No. 2. pp. 26801.
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AU - Schulze-Wischeler, F.

AU - Hohls, F.

AU - Zeitler, U.

AU - Reuter, D.

AU - Wieck, A. D.

AU - Haug, R. J.

N1 - Funding information: We acknowledge financial support by BMBF and DFG priority program “quantum Hall systems.”

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