Bunching of Carriers in Momentum Space under Crossed Magnetic and Intense Microwave Fields in Semiconductors

概要

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The motion of a carrier in momentum space is examined in detail for the case thatan intense microwave electric field and a static magnetic field perpendicular to it areapplied to semiconductors in which the predominant scattering process is the opticalphonon emission. The motion changes the type in a systematic way depending on thestrengths of the fields. Particularly in intermediate magnetic field range, the motionrapidly converges to a terminal motion independent of the initial condition, leadingto a bunching of the carriers in the momentum space. The convergence becomes slowas the magnetic field is decreased. In strong magnetic fields, the motion becomes oflong period or chaotic. The type of the motion changes periodically with the electricfield. The calculation is carried out for two waveforms, square and sinusoidal. Theresults are very similar to each other as for the bunching, implying its genericproperty.
社団法人日本物理学会の論文
1989-11-15