Cyclotron resonance in antidot arrays
Cyclotron resonance in antidot arrays
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解点阵列中的回旋共振
DOI：
10.1103/physrevb.65.125326
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发表时间：
2001
影响因子：
3.7
通讯作者：
I. Gornyi
中科院分区：
文献类型：
--
作者：
D. Polyakov;Ferdinand Evers;I. Gornyi
研究了强磁场中电子气被不可穿透反点散射的动力学性质。我们发现，回旋共振的线形是非常不同的洛仑兹，并不具有德鲁德散射率。我们表明，跳跃轨道的耗散动力学响应S c（ω）在回旋加速器频率ω t的尺度上被加宽，并且具有急剧的下降| ω- ω，|。对于小的反点，Sc（ω）以等于ω c的周期被强烈调制，并在一系列共振频率下具有尖锐的平方根奇异性。对于大的反点，S（ω）在ω < ω 1的两个尖锐峰之间具有硬能隙，分别与边缘态和自由回旋轨道有关。
We study the dynamical properties of an electron gas scattered by impenetrable antidots in the presence of a strong magnetic field. We find that the line shape of the cyclotron resonance is very different from the Lorentzian and is not characterized by the Drude scattering rate. We show that the dissipative dynamical response of skipping orbits, S c (ω), is broadened on a scale of the cyclotron frequency ω t and has a sharp dip ‖ω- ω, ‖. For small antidots, S c ( (ω) is strongly modulated with a period equal to ω c and has sharp square-root singularities for a series of resonant frequencies, For large antidots, S (ω) has a hard gap at ω < ω 1 between two sharp peaks, associated, respectively, with edge states and free cyclotron orbits.