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Direct Measurement of the g-Factor of Composite Fermions

F. Schulze-Wischeler·E. Mariani·F. Hohls·R. J. Haug
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Abstract

The activation gap $Δ$ of the fractional quantum Hall states at constant fillings $ν=2/3$ and 2/5 has been measured as a function of the perpendicular magnetic field $B$. A linear dependence of $Δ$ on $B$ is observed while approaching the spin polarization transition. This feature allows a direct measurement of the $g$-factor of composite fermions which appears to be heavily renormalized by interactions and strongly sensitive to the electronic filling factor.

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F. Schulze-Wischeler, E. Mariani, F. Hohls, R. J. Haug. 2003-10-10. Direct Measurement of the g-Factor of Composite Fermions. https://doi.org/10.1103/physrevlett.92.156401

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