直流驱动二维系统中回旋共振次谐波的微波光阻效应
Microwave Photoresistance in dc-driven 2D Systems at Cyclotron Resonance Subharmonics
摘要:
研究了高迁移率二维电子系统在强直流电场作用下的微波光阻振荡。我们发现,附近的第二次谐波的回旋共振的直流电场的电阻率振荡的频率是两倍的回旋共振,其谐波,或在没有微波辐射的振荡频率。讨论了微波引起的边带的状态密度和不同的散射过程之间的相互作用,在分离的朗道能级制度。
英文摘要:
We study microwave photoresistivity oscillations in a high mobility two-dimensional electron system subject to strong dc electric fields. We find that near the second subharmonic of the cyclotron resonance the frequency of the resistivity oscillations with dc electric field is twice the frequency of the oscillations at the cyclotron resonance, its harmonics, or in the absence of microwave radiation. This observation is discussed in terms of the microwave-induced sidebands in the density of states and the interplay between different scattering processes in the separated Landau level regime.
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