Radiation-induced zero-resistance states with resolved Landau levels

The microwave-photoexcited high mobility GaAs/AlGaAs two-dimensional electron system exhibits an oscillatory magnetoresistance with vanishing resistance in the vicinity of magnetic fields B=[4/(4j+1)]B-f, where B-f=2pifm*/e, m* is an effective mass, e is the charge, f is the microwave frequency, and j=1,2,3... Here, we report transport with well-resolved Landau levels, and some transmission characteristics. (C) 2004 American Institute of Physics.