Commensurability oscillations of hole-flux composite fermions

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

doi:10.1103/PhysRevLett.109.236401

Commensurability oscillations of hole-flux composite fermions

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

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29 Scopus citations

Abstract

We report the observation of commensurability oscillations of hole-flux composite fermions near a filling factor of 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 0.1μm for the hole-flux composite fermions.

Original language	English (US)
Article number	236401
Journal	Physical review letters
Volume	109
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.109.236401
State	Published - Dec 4 2012

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.109.236401

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abstract = "We report the observation of commensurability oscillations of hole-flux composite fermions near a filling factor of 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 0.1μm for the hole-flux composite fermions.",

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AU - Shayegan, M.

AU - Pfeiffer, L. N.

AU - West, K. W.

AU - Baldwin, K. W.

PY - 2012/12/4

Y1 - 2012/12/4

N2 - We report the observation of commensurability oscillations of hole-flux composite fermions near a filling factor of 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 0.1μm for the hole-flux composite fermions.

AB - We report the observation of commensurability oscillations of hole-flux composite fermions near a filling factor of 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 0.1μm for the hole-flux composite fermions.

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Commensurability oscillations of hole-flux composite fermions

Abstract

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