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What Determines the Fermi Wave Vector of Composite Fermions?

Author(s): Kamburov, D; Liu, Yang; Mueed, MA; Shayegan, Mansour; Pfeiffer, LN; et al

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Abstract: Composite fermions (CFs), exotic particles formed by pairing an even number of flux quanta to each electron, provide a fascinating description of phenomena exhibited by interacting two-dimensional electrons at high magnetic fields. At and near Landau level filling ν=1/2, CFs occupy a Fermi sea and exhibit commensurability effects when subjected to a periodic potential modulation. We observe a pronounced asymmetry in the magnetic field positions of the commensurability resistance minima of CFs with respect to the field at ν=1/2. This unexpected asymmetry is consistent with the CFs' Fermi wave vector being determined by the minority carriers in the lowest Landau level, and suggests a breaking of the particle-hole symmetry for CFs near ν=1/2.
Publication Date: Nov-2014
Electronic Publication Date: 6-Nov-2014
Citation: Kamburov, D, Liu, Yang, Mueed, MA, Shayegan, M, Pfeiffer, LN, West, KW, Baldwin, KW. (2014). What Determines the Fermi Wave Vector of Composite Fermions?. Physical Review Letters, 113 (19), 10.1103/PhysRevLett.113.196801
DOI: doi:10.1103/PhysRevLett.113.196801
ISSN: 0031-9007
EISSN: 1079-7114
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review Letters
Version: Author's manuscript

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