Controllable Tuning of the Spin-Dependent Transport in the Graphene Sheet

Abstract:

Based on the non-equilibrium Green’s function in combination with the density-functional theory, The spin-dependent transport in the short graphene nanoribbon (graphene sheet) asymmetrically coupled to the electrodes of Au chains is investigated. It is found that a fully spin-polarized current (close to 100%) can be produced at the output port. The physics underlying attributes to the spatially separated edge states of the sheet caused by asymmetric contacts. Especially, the current^'s spin polarized direction can be tuned simply by changing the contact locations of the electrodes to the graphene sheet.

• Periodical: Applied Mechanics and Materials (Volumes 668-669)
• Pages: 8-11
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.668-669.8
• Online since: October 2014
• Authors: Chun Mei Liu, Zhuan Li, Jun Ling Wang, Li Li Zhao, Yang Wang
• Keywords: Asymmetric Contacts, Graphene Sheet, Spin-Dependent Electronic Transport

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