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Influence of spin on the activation energies at ν=1/3

Physica E: Low-dimensional Systems and Nanostructures, ISSN: 1386-9477, Vol: 34, Issue: 1, Page: 108-111
2006
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The activation energy Δ of the fractional quantum Hall state at constant filling factor ν=13 and also at ν=25 and 23 has been measured as a function of the perpendicular magnetic field B while modulating the electron density via a top gate. At small magnetic fields we observe a linear increase of Δ with the magnetic field. The slope of Δ vs. B allows us to directly extract the composite fermion g -factor.

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