Electron Transport Properties of Graphene-Based Quantum Wires  

作　　者：Hua Zhao Xiao-Wei Zhang Xiao-Chun Liu Yong Zheng Wan-Guo Liu 赵华;张小伟;刘晓春;郑勇;刘晚果

机构地区：[1]School of Physics and Electronics,Qiannan Normal University for Nationalities

出　　处：《Communications in Theoretical Physics》2018年第12期829-833,共5页理论物理通讯（英文版）

基　　金：Supported by the Foundation of Scientific Innovative Research Team of Education Department of Guizhou Province under Grant No.201329;the Science and Technology Foundation of Guizhou Province Grant No.J20122311;University Scientific and Technological Innovation Talents Program of Guizhou Province Grant No.2013154

摘　　要：We study the electronic transport in quantum wire structures made of graphene. By using the nonequilibrium Green function method, the transmission is studied for varies sizes samples. Our results show that the transmission sensitive depends on the size of the system and exhibits fluctuations due to the mismating of propagating modes between the central region and the leads. The number of resonant transmission peaks increases with the increase of length of the wire, while the width of the leads mainly affect the transmission in the region of low energy. A central energy gap in the transmission spectrum is more likely to appear in the quantum wire system than in the uniform armchair graphene nanoribbons. Moreover, the energy gap can be widened for a certain size of the quantum wire system by changing the width of the leads. These results may have potential applications in designing graphene-based devices.

关 键 词：GRAPHENE QUANTUM WIRE TRANSMISSION 

分 类 号：O4[理学—物理]