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arXiv · 1208.0650

Hole-flux Composite Fermion Commensurability Oscillations

D. Kamburov·M. Shayegan·L. N. Pfeiffer·K. W. West·K. W. Baldwin
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Abstract

We report the observation of commensurability oscillations of hole-flux composite fermions near filling factor $ν=1/2$ 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 $μ$m for the hole-flux composite fermions.

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D. Kamburov, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin. 2012-08-03. Hole-flux Composite Fermion Commensurability Oscillations. https://doi.org/10.1103/physrevlett.109.236401

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