title: Effect of contact barrier on electron transport in graphene.
abstract: The influence of the barrier between metal electrodes and graphene on the electrical properties was studied on a two-electrode device. A classical barrier model was used to analyze the current-voltage characteristics. Primary parameters including barrier height and effective resistance were achieved. The electron transport properties under magnetic field were further investigated. An abnormal peak-valley-peak shape of voltage-magnetoresistance curve was observed. The underlying mechanisms were discussed under the consideration of the important influence of the contact barrier. Our results indicate electrical properties of graphene based devices are sensitive to the contact interface.
authors.affiliation: State Key Laboratory for Mesoscopic Physics, and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Yang-Bo
authors.initials: YB
authors.lastname: Zhou
authors.forename: Bing-Hong
authors.initials: BH
authors.lastname: Han
authors.forename: Zhi-Min
authors.initials: ZM
authors.lastname: Liao
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhao
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Da-Peng
authors.initials: DP
authors.lastname: Yu