Spin polarization of composite fermions and particle-hole symmetry breaking

Yang Liu, S. Hasdemir, A. Wójs, Jainendra K. Jain, L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan

Research output: Contribution to journalArticle

22 Citations (Scopus)

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.

Original languageEnglish (US)
Article number085301
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number8
DOIs
StatePublished - Aug 8 2014

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Spin polarization
Fermions
broken symmetry
fermions
composite materials
Electrons
Composite materials
polarization
Semiconductor quantum wells
electrons
quantum wells
symmetry
interactions
energy
gallium arsenide

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Liu, Yang ; Hasdemir, S. ; Wójs, A. ; Jain, Jainendra K. ; Pfeiffer, L. N. ; West, K. W. ; Baldwin, K. W. ; Shayegan, M. / Spin polarization of composite fermions and particle-hole symmetry breaking. In: Physical Review B - Condensed Matter and Materials Physics. 2014 ; Vol. 90, No. 8.
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Spin polarization of composite fermions and particle-hole symmetry breaking. / Liu, Yang; Hasdemir, S.; Wójs, A.; Jain, Jainendra K.; Pfeiffer, L. N.; West, K. W.; Baldwin, K. W.; Shayegan, M.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 8, 085301, 08.08.2014.

Research output: Contribution to journalArticle

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AU - Liu, Yang

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AU - Baldwin, K. W.

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