Electron drift velocity and mobility in graphene
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.
Keywordsgraphene mobility nano-electronic devices
This study was supported by the Fundamental Research Funds for the Central Universities (Grant No. 2015XKMS077) and the National Natural Science Foundation of China (Grant Nos. 11604380 and 11774416).
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