title: Giant magnetoresistance and spin Seebeck coefficient in zigzag α-graphyne nanoribbons.
abstract: We investigate the spin-dependent electric and thermoelectric properties of ferromagnetic zigzag α-graphyne nanoribbons (ZαGNRs) using density-functional theory combined with non-equilibrium Green's function method. A giant magnetoresistance is obtained in the pristine even-width ZαGNRs and can be as high as 10(6)%. However, for the doped systems, a large magnetoresistance behavior may appear in the odd-width ZαGNRs rather than the even-width ones. This suggests that the magnetoresistance can be manipulated in a wide range by the dopants on the edges of ZαGNRs. Another interesting phenomenon is that in the B- and N-doped even-width ZαGNRs the spin Seebeck coefficient is always larger than the charge Seebeck coefficient, and a pure-spin-current thermospin device can be achieved at specific temperatures.
authors.affiliation: College of Physics, Optoelectronics and Energy, Soochow University, 1 Shizi Street, Suzhou, Jiangsu 215006, China. xf_wang1969@yahoo.com.
authors.forename: Ming-Xing
authors.initials: MX
authors.lastname: Zhai
authors.forename: Xue-Feng
authors.initials: XF
authors.lastname: Wang
authors.forename: P
authors.initials: P
authors.lastname: Vasilopoulos
authors.forename: Yu-Shen
authors.initials: YS
authors.lastname: Liu
authors.forename: Yao-Jun
authors.initials: YJ
authors.lastname: Dong
authors.forename: Liping
authors.initials: L
authors.lastname: Zhou
authors.forename: Yong-Jing
authors.initials: YJ
authors.lastname: Jiang
authors.forename: Wen-Long
authors.initials: WL
authors.lastname: You