Spin-dependent transport induced by magnetization in zigzag graphene nanoribbons coupled to one-dimensional leads

doi:10.1088/1674-1056/21/1/017305

Abstract We study spin transport in a zigzag graphene nanoribbon sample with two ferromagnetic strips deposited on the two sides of the ribbon. A tight-binding Hamiltonian was adopted to describe the sample connected to two one-dimensional leads. Our theoretical study shows that the resonance peaks of conductance for the spin-up and spin-down electrons are separated for the parallel configuration of the ferromagnetic strips, while they are not separated for the case of antiparallel configuration. This means that giant magnetoresistance can be produced at particular energies by altering the configurations of the ferromagnetic strips, and the device can be designed as a spin filter.

Keywords: graphene nanoribbon giant magnetoresistance conductance current-voltage characteristic

Received: 04 August 2011
Revised: 28 August 2011
Accepted manuscript online:

PACS:	73.63.-b	(Electronic transport in nanoscale materials and structures)
	72.80.Vp	(Electronic transport in graphene)
	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11064010) and the Project of Qiannan Normal College for Nationalities, China (Grant No. QNSY201012).

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Zhao Hua(赵华), Zhang Xiao-Wei(张小伟), Cai Tuo(蔡托) Sang Tian(桑田), Liu Xiao-Chun(刘晓春), and Liu Fang(刘芳) Spin-dependent transport induced by magnetization in zigzag graphene nanoribbons coupled to one-dimensional leads 2012 Chin. Phys. B 21 017305

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Spin-dependent transport induced by magnetization in zigzag graphene nanoribbons coupled to one-dimensional leads

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