DC和微波激发下二维电子系统中回旋共振次谐波的多光子过程
Multiphoton processes at cyclotron resonance subharmonics in a 2D electron system under DC and microwave excitation
摘要：
本文研究了在回旋共振次谐波微波辐射下的二维电子系统。2DES携带足够的直流电流$I$，当$I$被扫描时，微分电阻率振荡。在磁场足以解决个人朗道水平，我们发现在一个$I$范围内的振荡的数量系统地随着微波功率的增加而变化。$N$光子的微波吸收和发射，其中$N$由微波功率控制，描述了我们的观察在霍尔场倾斜朗道能级之间的杂质散射的位移机制的框架。
英文摘要：
We investigate a two-dimensional electron system (2DES) under microwave illumination at cyclotron resonance subharmonics. The 2DES carries sufficient direct current, $I$, that the differential resistivity oscillates as $I$ is swept. At magnetic fields sufficient to resolve individual Landau levels, we find the number of oscillations within an $I$ range systematically changes with increasing microwave power. Microwave absorption and emission of $N$ photons, where $N$ is controlled by the microwave power, describes our observations in the framework of the displacement mechanism of impurity scattering between Hall-field tilted Landau levels.
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