AN Li-ping, . The spin-dependent transport properties of a zigzag graphene nanoribbon edge-defect junction. New Carbon Mater., 2012, 27(3): 181-187. doi: 10.1016/S1872-5805(12)60012-2
Citation:
AN Li-ping, . The spin-dependent transport properties of a zigzag graphene nanoribbon edge-defect junction. New Carbon Mater., 2012, 27(3): 181-187. doi: 10.1016/S1872-5805(12)60012-2
AN Li-ping, . The spin-dependent transport properties of a zigzag graphene nanoribbon edge-defect junction. New Carbon Mater., 2012, 27(3): 181-187. doi: 10.1016/S1872-5805(12)60012-2
Citation:
AN Li-ping, . The spin-dependent transport properties of a zigzag graphene nanoribbon edge-defect junction. New Carbon Mater., 2012, 27(3): 181-187. doi: 10.1016/S1872-5805(12)60012-2
AN LI-ping(1975-), female, Ph. D., Lecturer, engaged in the research of photonic crystals and nanostructure materials. E-mail: fox781209@mail.ecust.edu.cn
First-principles calculation was performed to investigate the transport properties of edge-defect junctions of graphene with H-terminated or bare edges, which were generated by removing edge carbon atoms from a perfect ribbon. The edge defect changes the electronic transport behavior of a zigzag graphene nanoribbon from spin-degenerated for a perfect ribbon to highly spin-polarized for edge-defective ones at the Fermi level. The electronic local density of states isosurface calculations could help understand the transport results. These junctions could generate spin-polarized currents. Especially, the bare edge-defect junction has a high spin filter efficiency regardless of the external bias. This behavior suggests a possible use of the edge-defective graphene in a spin filter system. Keywords: Graphene nanoribbon; Edge-defect junction; Spin-dependent transport
DownLoad: