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- W2595534597 abstract "The average electron spin polarization $P$ of a two-dimensional electron gas confined in GaAs/GaAlAs multiple quantum wells was measured by NMR near the fractional quantum Hall state with filling factor $ensuremath{nu}phantom{rule{0ex}{0ex}}=phantom{rule{0ex}{0ex}}frac{2}{3}$. Above this filling factor ( $frac{2}{3}ensuremath{le}ensuremath{nu}<0.85$), a strong depolarization is observed corresponding to two spin flips per additional flux quantum. The most remarkable behavior of the polarization is observed at $ensuremath{nu}phantom{rule{0ex}{0ex}}=phantom{rule{0ex}{0ex}}frac{2}{3}$, where a quantum phase transition from a partially polarized ( $Pensuremath{approx}frac{3}{4}$) to a fully polarized ( $Pphantom{rule{0ex}{0ex}}=phantom{rule{0ex}{0ex}}1$) state can be driven by increasing the ratio between the Zeeman and the Coulomb energy above a critical value ${ensuremath{eta}}_{mathrm{c}}phantom{rule{0ex}{0ex}}=phantom{rule{0ex}{0ex}}frac{{ensuremath{Delta}}_{mathrm{Z}}}{{ensuremath{Delta}}_{mathrm{C}}}phantom{rule{0ex}{0ex}}=phantom{rule{0ex}{0ex}}0.0185$." @default.
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- W2595534597 date "2001-09-07" @default.
- W2595534597 modified "2023-10-18" @default.
- W2595534597 title "New Phase Transition between Partially and Fully Polarized Quantum Hall States with Charge and Spin Gaps at<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=italic>ν</mml:mi><mml:mspace /><mml:mo>=</mml:mo><mml:mspace /><mml:mfrac><mml:mrow><mml:mn>2</mml:mn></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:mfrac></mml:math>" @default.
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- W2595534597 doi "https://doi.org/10.1103/physrevlett.87.136801" @default.
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