Transport in the Fractional Quantum Hall Regime

At low temperatures and high magnetic fields the carriers of two-dimensional electron systems condense into a novel quantum fluid at rational Landau level filling nu = p/q. The sequence of condensed states manifests itself in transport experiments as plateaus in the Hall resistance quantized to rho sub xy = h/nu e sup 2 and vanishing resistivity rho sub xx. Most of the phenomena are well described within the framework of Laughlin's many-particle wave function and a hierarchical scheme of derived daughter states. This talk will review our recent experiments on the FQHE including determination of the energy gap, observation of the first even-denominator fraction, and the termination of the FQHE at very low Landau level filling factors.