Pulsed Magnetic Field Measurements of the Composite Fermion Effective Mass

Details Pulsed Magnetic Field Measurements of the Composite Fermion Effective Mass Pulsed Magnetic Field Measurements of the Composite Fermion Effective Mass

1995-08-16

arxiv.org/abs/cond-mat/9508059v2

Physics

Condensed Matter

Has final table, will LaTeX without errors

Scientific paper

10.1103/PhysRevB.53.2057

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.

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