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Drift-induced modifications to the dynamical polarization of graphene

机译:漂移引起的石墨烯动力极化修饰

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摘要

The response function of graphene is calculated in the presence of a constant current across the sample. For small drift velocities and finite chemical potential, analytic expressions are obtained and consequences on the plasmonic excitations are discussed. For general drift velocities and zero chemical potential, numerical results are presented and a plasmon gain region is identified that is related to interband transitions.
机译:石墨烯的响应函数是在样品上存在恒定电流的情况下计算的。对于较小的漂移速度和有限的化学势,获得了解析表达式,并讨论了对等离子体激元激发的影响。对于一般的漂移速度和零化学势,给出了数值结果,并确定了与带间跃迁相关的等离激元增益区域。

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