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

Dethlefsen, A. F. ; Mariani, E. ; Wegscheider, Werner ; Haug, R. J.
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Date of publication of this fulltext: 25 Jan 2010 13:23


Abstract

The activation energy Δ of the fractional quantum Hall state at constant filling factor View the MathML source and also at View the MathML source and View the MathML source 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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