Pulsed-magnetic-field measurements of the composite-fermion effective mass
Abstract
Magnetotransport measurements of composite fermions (CF's) 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 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 √B* at high fields.
- Publication:
-
Physical Review B
- Pub Date:
- January 1996
- DOI:
- 10.1103/PhysRevB.53.2057
- arXiv:
- arXiv:cond-mat/9508059
- Bibcode:
- 1996PhRvB..53.2057L
- Keywords:
-
- 72.20.Jv;
- 73.20.Dx;
- 73.40.Hm;
- Charge carriers: generation recombination lifetime and trapping;
- Condensed Matter
- E-Print:
- Has final table, will LaTeX without errors