%0 Journal Article
%T Pulsed Magnetic Field Measurements of the Composite Fermion Effective Mass
%A D. R. Leadley
%A M. van der Burgt
%A R. J. Nicholas
%A C. T. Foxon
%A J. J. Harris
%J Physics
%D 1995
%I arXiv
%R 10.1103/PhysRevB.53.2057
%X Magnetotransport measurements of Composite Fermions (CF) are reported in 50 T pulsed magnetic fields. The CF effective mass is found to increase approximately linearly with the effective field $B^*$, in agreement with our earlier work at lower fields. For a $B^*$ of 14 T it reaches $1.6m_e$, over 20 times the band edge electron mass. Data from all fractions are unified by the single parameter $B^*$ for all the samples studied over a wide range of electron densities. The energy gap is found to increase like $\sqrt{B^*}$ at high fields.
%U http://arxiv.org/abs/cond-mat/9508059v2