Carrier Transport in Armchair and Zigzag Graphene Nanoribbons

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• 作者：Mohammad Reza Jafari ; Bahram Bahrami…
• 关键词：Armchair and zigzag nanoribbons ; Boltzmann transport ; conductivity ; Coulomb scattering ; graphene
• 刊名：Journal of Electronic Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：46
• 期：1
• 页码：573-578
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
• 出版者：Springer US
• ISSN：1543-186X
• 卷排序：46

文摘

The conductivity of armchair and zigzag graphene nanoribbons in the presence of Coulomb scattering due to the charged impurities is investigated theoretically based on the Boltzmann transport equation formalism. The influence of different relevant physical parameters on the conductivity is examined. It is found that the combined effects of Fermi energy, impurity density, distance between impurity carriers, and width of the graphene strips are all able to modify the conductivity of graphene nanoribbons. The conductivity show an increasing trend by increase of Fermi energy and width, which is assigned to the increase of the occupied sub-bands number. Our numerical results predict that the conductivity of zigzag and armchair nanoribbons are qualitatively similar.