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A Monte Carlo Study of electron transport in suspended monolayer graphene

机译：悬浮单层石墨烯电子传输的蒙特卡罗研究

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摘要

A microscopic study of electronic transport in suspended monolayer graphene is presented. The results have been obtained by means of an ensemble Monte Carlo simulator that takes into account the main physical properties of the graphene bandstructure and the most relevant scattering mechanisms for this type of material. The carrier velocity value is mainly set by the dominant influence of optical and acoustic intervalley phonons, particularly at high electric fields, where a negative differential conductance is observed. The average time between scatterings shows an asymptotic behavior with the applied electric field, with values in the order of tenths of ps. The influence of the electric field on the wavevector distribution is also analyzed, showing a saturation trend in the displacement of the charge centroid with a linear increase in the average energy. Finally, the instantaneous velocity and the correlation function of velocity fluctuations are also studied.
机译：介绍了悬浮单层石墨烯中电子输送的微观研究。通过集合蒙特卡罗模拟器获得了结果，该模拟器考虑了石墨烯带结构的主要物理性质和这种类型的材料的最相关的散射机构。载流器速度值主要由光学和声学inchalley声子的主要影响，特别是在高电场，观察到负差分传导。散射之间的平均时间显示了与所施加的电场的渐近行为，其中值为PS的十分之一。还分析了电场对波动分布的影响，示出了在电荷质心的位移中具有平均能量的线性增加的饱和趋势。最后，还研究了瞬时速度和速度波动的相关函数。

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