Full text loading...
(a) Schematic top view of the sample. Two sets of metallic interdigitated gates (black) are evaporated on top of a mesa stripe (gray). By applying time-periodic signals to the gates, a source-drain current is induced. (b) A cross-sectional view of the sample. (c) A schematic of the pumping mechanism.
Experimental phase dependence of the normalized pumped direct current for different wave forms (symbols) at a frequency of and a peak-to-peak value of the excitation voltage of . The lines represent the results of the simulation.
Rectangular wave-form signals for a peak-to-peak value of the excitation voltage of at different frequencies. (a) traces (solid line: ; dashed line: ; dotted line: ; and dashed-dotted line: ), (b) gray scale plot of and (c) gray scale plot of the . Darker gray tones indicate (b) higher currents and (c) higher derivatives , respectively.
Article metrics loading...