Impurity and edge roughness scattering in graphene nanoribbons: the Boltzmann approach

被引：13
|
作者：
Xu, Hengyi [1 ]
Heinzel, Thomas [1 ]
机构：
[1] Univ Dusseldorf, Condensed Matter Phys Lab, D-40225 Dusseldorf, Germany
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 45期
关键词：
QUANTUM WIRES; TRANSPORT;
D O I：
10.1088/0953-8984/24/45/455303
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The conductivity of graphene nanoribbons in the presence of bulk impurities and edge roughness is studied theoretically using the Boltzmann transport equation for quasi-one-dimensional systems. As the number of occupied subbands increases, the conductivity due to bulk impurities converges towards the two-dimensional case. It is shown that the dependence of the conductivity generated by edge roughness scattering depends in a distinctly different way on the sample parameters than the conductivity due to bulk scattering. The Boltzmann model furthermore predicts the amplitude of the edge-roughness-induced magnetoconductance dip as a function of the amplitude and the correlation length of the edge roughness.
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页数：9
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