2003/09/30 by F. Schulze-Wischeler, E. Mariani, F. Hohls +1
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.92.156401
published as Phys. Rev. Lett 92, 156401 (2004) · 4 pages, 4 figures Changed content: Fokus more on g-factors (and less on other details)
arxiv created 2003/10/10 · arxiv updated 2009/12/01
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.