The Spin Configuration of Fractional QHE Ground States in the N=0 Landau Level
Current opinion is that FQHE ground states seen in the N=0 Landau level are fully spin polarized. No one has seriously questioned this, despite theoretical evidence to the contrary /1/ and observation of anomalies in the 1+(2>v>1) fractions /2/. The purpose of the present work is to demonstrate that the spin behaviour is not so simple: fully polarized ground states are not favourable throughout the full range of filling factor and magnetic field. Furthermore, the measured activation energies have a large Zeeman component in place of the expected Coulomb gap.
KeywordsLandau Level Pair Correlation Function Spin Configuration Zeeman Energy Hybrid Magnet
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