Pulsed-magnetic-field measurements of the composite-fermion effective mass.

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 1.6me, over 20 times the band edge electron mass. Data from all fractions are… CONTINUE READING