High-field transport and optical phonon scattering in graphene
High-field transport and optical phonon scattering in graphene
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DOI：
10.1103/physrevb.84.045406
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发表时间：
2011-07-05
影响因子：
3.7
通讯作者：
Schuerrer, Ferdinand
中科院分区：
文献类型：
--
作者：
Lichtenberger, Peter;Morandi, Omar;Schuerrer, Ferdinand
研究了石墨烯中电子与光学声子的耦合动力学。为此，建立了基于电子和光学声子空间相关玻尔兹曼输运方程的动力学模型。这个系统是解决确定性的方法，提供有效的准确的结果，动态处理非平衡现象。数值模拟清楚地表明，这种方法的重要性时，计算在一个合理的电压范围内的I-V特性。光学声子占据超过平衡值的数千倍，发现这对石墨烯中的载流子输运有很大的影响。
The coupled dynamics of electrons and optical phonons in graphene is investigated. For this purpose, a kinetic model based on space-dependent Boltzmann transport equations for electrons and optical phonons is established. This system is solved by deterministic methods that provide efficiently accurate results by dynamically treating nonequilibrium phenomena. The numerical simulations clearly show the importance of this approach when calculating I-V characteristics over a reasonable voltage range. Optical phonon occupations surpassing equilibrium values by factors of thousands were found which affect the charge carrier transport considerably in graphene.