Giant magnetoresistance and spin Seebeck coefficient in zigzag α-graphyne nanoribbons

Ming Xing Zhai, Xue Feng Wang, P. Vasilopoulos, Yu Shen Liu, Yao Jun Dong, Liping Zhou, Yong Jing Jiang, Wen Long You

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

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 106%. 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. This journal is

Original languageEnglish (US)
Pages (from-to)11121-11129
Number of pages9
JournalNanoscale
Volume6
Issue number19
DOIs
StatePublished - Oct 7 2014

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