Electron drift velocity and mobility in graphene

Electron drift velocity and mobility in graphene
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石墨烯中的电子漂移速度和迁移率

DOI:
10.1007/s11467-017-0744-0
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发表时间:
2018-04
影响因子:
7.5
通讯作者:
Liu Jin-Long
Liu Jin-Long
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Dong Hai-Ming;Duan Yi-Feng;Huang Fei;Liu Jin-Long

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我们提出了一个理论研究的电输运性质的石墨烯基板系统。漂移速度,迁移率和温度的电子是自洽确定使用玻尔兹曼平衡方程。结果表明,电子输运表现出明显的非线性行为。随着电场的增加,获得了非常高的迁移率。随着电场的增加,电子速度并不完全饱和。超热电子的温度与电场呈准线性关系。此外,我们表明,电子的速度,迁移率和电子温度是敏感的电子密度。这些发现可用于石墨烯在高场纳米电子器件中的应用。
We present a theoretical study of the electric transport properties of graphene-substrate systems. The drift velocity, mobility, and temperature of the electrons are self-consistently determined using the Boltzmann equilibrium equations. It is revealed that the electronic transport exhibits a distinctly nonlinear behavior. A very high mobility is achieved with the increase of the electric fields increase. The electron velocity is not completely saturated with the increase of the electric field. The temperature of the hot electrons depends quasi-linearly on the electric field. In addition, we show that the electron velocity, mobility, and electron temperature are sensitive to the electron density. These findings could be employed for the application of graphene for high-field nano-electronic devices.
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