title: Atomic scale investigation of a graphene nano-ribbon based high efficiency spin valve.
abstract: Graphene nanoribbons based electronic devices present many interesting physical properties. We designed and investigated the spin-dependent electron transport of a device configuration, which is easy to be fabricated, with an oxygen-terminated ZGNR central scatter region between two hydrogen-terminated ZGNR electrodes. According to the analysis based on non-equilibrium Green's function and density functional theory, the proposed device could maintain its good spin-filter performance (80% to 99%) and have a stable magneto resistance value up to 10(5)%. The spin dependent electron transmission spectrum and space-resolve density of states are employed to investigate the physical origin of the spin-polarized current and magneto resistance.
authors.affiliation: State Key Laboratory of ASIC and System, Department of Microelectronics, Fudan University, Shanghai 200433, China.
authors.forename: Qing-Qing
authors.initials: QQ
authors.lastname: Sun
authors.forename: Lu-Hao
authors.initials: LH
authors.lastname: Wang
authors.forename: Wen
authors.initials: W
authors.lastname: Yang
authors.forename: Peng
authors.initials: P
authors.lastname: Zhou
authors.forename: Peng-Fei
authors.initials: PF
authors.lastname: Wang
authors.forename: Shi-Jin
authors.initials: SJ
authors.lastname: Ding
authors.forename: David Wei
authors.initials: DW
authors.lastname: Zhang