Evidence of Landau levels and interactions in low-lying excitations of composite fermions at 1/3 <= ν<= 2/5

Abstract

Excitation modes in the range $2/5\ge \nu \ge 1/3$ of the fractional quantum Hall regime are observed by resonant inelastic light scattering. Spectra of spin reversed excitations suggest a structure of lowest spin-split Landau levels of composite fermions that is similar to that of electrons. Spin-flip energies determined from spectra reveal significant composite fermion interactions. The filling factor dependence of mode energies display an abrupt change in the middle of the range when there is partial population of a composite fermion level.

arXiv comment5 pages, 4 figures

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Cited by in corpus (26)

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• Wavefunctionology: The Special Structure of Certain Fractional Quantum Hall Wavefunctions
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• Partially spin polarized quantum Hall effect in the filling factor range 1/3 < nu < 2/5
• Spin-texture and magneto-roton excitations at nu=1/3
• Observation of non-conventional spin waves in composite fermion ferromagnets
• Fractionally charged skyrmions in fractional quantum Hall effect
• Transition from Free to Interacting Composite Fermions away from $\nu$=1/3
• Neutral Collective Modes in Spin-Polarized Fractional Quantum Hall States at Filling Factors 1/3, 2/5, 3/7, and 4/9
• Light scattering observations of spin reversal excitations in the fractional quantum Hall regime
• Crossover and Coexistence of Quasiparticle Excitations in the Fractional Quantum Hall Regime at $\nu \le 1/3$
• Gapped Excitations of unconventional FQHE states in the Second Landau Level
• Resonant Enhancement of Inelastic Light Scattering in the Fractional Quantum Hall Regime at $\nu =1/3$
• Flavor altering excitations of composite fermions
• Anomalously low magnetoroton energies of the unconventional fractional quantum Hall states of composite fermions
• Splitting of Girvin-MacDonald-Platzman density wave and the nature of chiral gravitons in fractional quantum Hall effect
• Spin-excitations of the quantum Hall ferromagnet of composite fermions
• Collective Modes and Raman Scattering in One Dimensional Electron Systems
• Metamorphosis of a Quantum Hall Bilayer State into a Composite Fermion Metal
• Gauge Theory of Composite Fermions: Particle-Flux Separation in Quantum Hall Systems
• Hamiltonian Theory of Disorder at 1/3
• Composite fermions in the neighborhood of $\nu =1/3$
• Spin excitations in the Fractional Quantum Hall regime at $\nu \lesssim 1/3$
• Probing fractional quantum Hall effect by photoluminescence
• Light Scattering by Low Lying Quasiparticle Excitations in the Fractional Quantum Hall Regime