Dethlefsen, Annelene F.; Mariani, E.; Tranitz, H.-P.; Wegscheider, W.; Haug, Rolf J.
(College Park, MD : American Physical Society, 2006)
The activation gap Δ of the fractional quantum Hall state at constant filling ν=1/3 is measured in a wide range of perpendicular magnetic field B. Despite the full spin polarization of the incompressible ground state, we ...