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Paper detail

Hole-flux Composite Fermion Commensurability Oscillations

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.

preprint2012arXivOpen access
D. KamburovM. ShayeganL. N. PfeifferK. W. WestK. W. Baldwin
cond-mat.mes-hall
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D. KamburovM. ShayeganL. N. PfeifferK. W. WestK. W. Baldwin

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