Function principle of a relaxation oscillator based on a bistable quantum Hall device
Function principle of a relaxation oscillator based on a bistable quantum Hall device
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基于双稳态量子霍尔器件的张弛振荡器的工作原理
DOI：
10.1063/1.1563729
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发表时间：
2003
影响因子：
4
通讯作者：
G. Hein
中科院分区：
文献类型：
--
作者：
G. Nachtwei;N. G. Kalugin;B. E. Sağol;C. Stellmach;G. Hein
我们提出了一种基于量子霍尔器件的简单弛豫振荡器，其几何形状接近量子霍尔效应的击穿。在击穿的迟滞区，量子霍尔器件表现出双稳态行为。如果将一个电阻串联并将一个电容并联到量子霍尔器件上，则双稳态开关导致电容器的后续充放电，可检测到弛豫振荡。我们通过求解基尔霍夫方程来解释观测到的振荡，并对实验进行了很好的定量描述。由此推导出了Corbino器件的一些动力学参数，并讨论了该振荡器的性能极限。
We present a simple relaxation oscillator based on a quantum Hall device with Corbino geometry near the breakdown of the quantum Hall effect. In the hysteresis region of the breakdown, the quantum Hall device exhibits bistable behavior. If a resistance is connected in series and a capacitor in parallel to the quantum Hall device, the bistable switching leads to subsequent charging and discharging of the capacitor, detectable as relaxation oscillations. We explain the observed oscillations by solving Kirchhoff’s equations and obtain a good quantitative description of the experiment. From this, we deduce some dynamical parameters of the Corbino device and discuss the performance limits of the oscillator.