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arXiv 1005.4157cond-mat.mes-hall
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双极石墨烯中的热载流子

Hot carriers in a bipolar graphene

Oleg G. Balev, Fedir T. Vasko

摘要:

考虑到声子散射引起的带内能量弛豫和热辐射引起的带间产生-复合跃迁,描述了直流电场作用下掺杂石墨烯中的热载流子。考虑的情况下,当载流子间散射有效地建立准平衡电子-空穴分布,有效的温度和浓度的载流子。浓度和能量平衡方程求解考虑到弱能量弛豫和生成-复合过程之间的相互作用。计算了弹性散射引起的动量弛豫的非线性电导率。的电流-电压特性,和双极和单极之间的过渡制度的电导率得到和分析,对于不同的温度和栅极电压。

英文摘要:

Hot carriers in a doped graphene under dc electric field is described taking into account the intraband energy relaxation due to acoustic phonon scattering and the interband generation-recombination transitions caused by thermal radiation. The consideration is performed for the case when the intercarrier scattering effectively establishes the quasiequilibrium electron-hole distributions, with effective temperature and concentrations of carriers. The concentration and energy balance equations are solved taking into account an interplay between weak energy relaxation and generation-recombination processes. The nonlinear conductivity is calculated for the momentum relaxation caused by the elastic scattering. The current-voltage characteristics, and the transition between bipolar and monopolar regimes of conductivity are obtained and analyzed, for different temperatures and gate voltages.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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