Theory of fractional microwave-induced resistance oscillations
Theory of fractional microwave-induced resistance oscillations
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DOI：
10.1103/physrevlett.99.206805
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发表时间：
2007-11-16
影响因子：
8.6
通讯作者：
Polyakov, D. G.
中科院分区：
文献类型：
--
作者：
Dmitriev, I. A.;Mirlin, A. D.;Polyakov, D. G.
我们开发了一个系统的理论，微波诱导的振荡的2D电子气的磁阻在附近的分数谐波的回旋共振，在最近的实验中观察到的。我们表明，在分离良好的朗道能级的限制的效果是由多光子过程引起的分布函数的变化占主导地位。在中等磁场下，无序加宽的朗道能级态密度中微波诱导边带的单光子机制变得重要。
We develop a systematic theory of microwave-induced oscillations in magnetoresistivity of a 2D electron gas in the vicinity of fractional harmonics of the cyclotron resonance, observed in recent experiments. We show that in the limit of well-separated Landau levels the effect is dominated by a change of the distribution function induced by multiphoton processes. At moderate magnetic field, a single-photon mechanism originating from the microwave-induced sidebands in the density of states of disorder-broadened Landau levels becomes important.