Hole-flux Composite Fermion Commensurability Oscillations

Abstract

We report the observation of commensurability oscillations of hole-flux composite fermions near filling factor $\nu =1/2$ in a high-mobility two-dimensional hole system confined to a GaAs quantum well, and subjected to a weak, strain-induced, unidirectional periodic potential modulation. The oscillations, which are consistent with ballistic transport of fully spin-polarized composite fermions in a weak periodic effective magnetic field, are surprisingly strong and exhibit up to third-order minima. We extract a ballistic mean-free-path of about 0.2 $\mu$m for the hole-flux composite fermions.

5 pages, 3 figures

References in corpus (3)

• Ballistic transport of (001) GaAs 2D holes through a strain-induced lateral superlattice
• Origin of positive magnetoresistance in small-amplitude unidirectional lateral superlattices
• Dependence of Modulation Amplitude on Electron Density in Unidirectional Lateral Superlattices: The Effect of the Thickness of the Two-dimensional Electron Gas

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