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(Color online) This figure shows the evolution of the diagonal resistance under radiation in the regime where strong SdH oscillations are observable in . Top: this panel shows the SdH oscillations in the absence of radiation . Center: here, under excitation has been exhibited with the radiation intensity attenuated to . The radiation produces a strong modulation in the amplitude of the SdH oscillations. Bottom: under photoexcitation, with the radiation attenuated to .
(Color online) This figure demonstrates the procedure for evaluating the average background resistance and the amplitude of the Shubnikov–de Haas oscillations using dark data. Thus, the data are first plotted vs . Then, the oscillatory extrema are marked as shown. The background resistance is defined as the average value of adjacent extremal resistances, while the amplitude of the SdH oscillations is the magnitude of one-half of the difference between neighboring extremal resistance values.
(Color online) (a) Figure shows the average background resistance vs under microwave excitation with the radiation attenuation in decibels as the parameter. (b) This panel shows the amplitude of the Shubnikov–de Haas oscillations as a function of at .
(Color online) (a) For dark specimen at , the amplitude of the Shubnikov–de Haas oscillations is plotted vs the average background resistance . (b) A plot of vs is shown in the vicinity of the resistance minimum for photoexcitation at and . Note the flow of the data towards the origin, which occurs with increasing the photoexcitation intensity.
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