Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.236401
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Funding
- DOE BES [DE-FG02-00-ER45841]
- Moore and Keck Foundations
- NSF [ECCS-1001719, DMR-0904117, MRSEC DMR-0819860]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1001719] Funding Source: National Science Foundation
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We report the observation of commensurability oscillations of hole-flux composite fermions near a filling factor of v 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: 1 mu m for the hole-flux composite fermions. DOI: 10.1103/PhysRevLett.109.236401
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