Microwave photo-voltaic oscillations in the GaAs/AlGaAs system

Microwave photo-excitation of the GaAs/AlGaAs system produces oscillations in the diagonal resistance that lead into novel zero-resistance states in the low temperature limit. Such photo-excitation also produces concomitant photo-voltage oscillations. Here, we examine this microwave photo-voltaic effect and correlate the results with observed magneto-transport over the frequency range 30 <= f <= 120 GHz in Hall bars fabricatedfrom material characterized by n = 2x 10¹¹cm^-2 .

Work has been supported by the ARO under W911NF-07-01-0158, and by the DOE under DE-SC0001762.