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arXiv 0908.0071cond-mat.mes-hallcond-mat.other
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石墨烯中长程库仑相互作用的散粒噪声和局域费米分布

Shot noise in Graphene with long range Coulomb interaction and the local Fermi distribution

Anatoly Golub, Baruch Horovitz

摘要:

基于Keldysh技术,采用动力学方程方法计算了弹道石墨烯中的散粒噪声功率。我们发现,局部能量分布函数服从泊松方程,表明映射到一个扩散金属系统。我们推导了包含长程库仑相互作用的一阶电导和噪声。我们发现,散粒噪声增加,由于相互作用,导致频率依赖性。此外,我们还发现简并态下的Fano因子为1/3,与没有库仑相互作用时的Fano因子相同。

英文摘要:

We calculate the shot noise power in ballistic graphene using the kinetic equation approach based on the Keldysh technique. We find that the local energy distribution function obeys Poisson's equation, indicating a mapping into a diffusive metal system. We derive the conductance and noise including the long range Coulomb interaction to first order. We find that the shot noise increases due to interaction, leading to a frequency dependence. Furthermore, we find that the Fano factor at degeneracy is 1/3, the same as without the Coulomb interaction.

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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