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Spin polarization of composite fermions and particle-hole symmetry breaking

Author(s): Liu, Yang; Hasdemir, S; Wójs, A; Jain, JK; Pfeiffer, LN; et al

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Abstract: We study the critical spin-polarization energy (αC) above which fractional quantum Hall states in two-dimensional electron systems confined to symmetric GaAs quantum wells become fully spin polarized. We find a significant decrease of αC as we increase the well width. In systems with comparable electron layer thickness, αC for fractional states near Landau level filling ν=3/2 is about twice larger than those near ν=1/2, suggesting a broken particle-hole symmetry. Theoretical calculations, which incorporate Landau level mixing through an effective three-body interaction, and finite layer thickness capture certain qualitative features of the experimental results.
Publication Date: Aug-2014
Electronic Publication Date: 8-Aug-2014
Citation: Liu, Yang, Hasdemir, S, Wójs, A, Jain, JK, Pfeiffer, LN, West, KW, Baldwin, KW, Shayegan, M. (2014). Spin polarization of composite fermions and particle-hole symmetry breaking. Physical Review B, 90 (8), 10.1103/PhysRevB.90.085301
DOI: doi:10.1103/PhysRevB.90.085301
ISSN: 1098-0121
EISSN: 1550-235X
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review B
Version: Author's manuscript

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