Abnormal electronic transport in disordered graphene nanoribbon

✍ Scribed by Yan-Yang Zhang; Jiang-Ping Hu; X.C. Xie; W.M. Liu

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 407 KB
• Volume: 404
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2009.04.025

✦ Synopsis

We investigate the conductivity s of graphene nanoribbons with zigzag edges as a function of Fermi energy E F in the presence of the impurities with different potential range. The dependence of sðE F Þ displays four different types of behavior, classified to different regimes of length scales decided by the impurity potential range and its density. Particularly, low density of long range impurities results in an extremely low conductance compared to the ballistic value, a linear dependence of sðE F Þ and a wide dip near the Dirac point, due to the special properties of long range potential and edge states. These behaviors agree well with the results from a recent experiment by Miao et al. [Science 317 (2007) 1530 (SOM)].