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DOI: 10.1063/1.4904295
OpenAccess: Closed
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Half-metallic properties, single-spin negative differential resistance, and large single-spin Seebeck effects induced by chemical doping in zigzag-edged graphene nanoribbons

Xifeng Yang,Wenqian Zhou,Xiaodong Hong,Yu‐Shen Liu,Xuefeng Wang,Jian Feng

Condensed matter physics
Materials science
Spin polarization
2015
Ab initio calculations combining density-functional theory and nonequilibrium Green’s function are performed to investigate the effects of either single B atom or single N atom dopant in zigzag-edged graphene nanoribbons (ZGNRs) with the ferromagnetic state on the spin-dependent transport properties and thermospin performances. A spin-up (spin-down) localized state near the Fermi level can be induced by these dopants, resulting in a half-metallic property with 100% negative (positive) spin polarization at the Fermi level due to the destructive quantum interference effects. In addition, the highly spin-polarized electric current in the low bias-voltage regime and single-spin negative differential resistance in the high bias-voltage regime are also observed in these doped ZGNRs. Moreover, the large spin-up (spin-down) Seebeck coefficient and the very weak spin-down (spin-up) Seebeck effect of the B(N)-doped ZGNRs near the Fermi level are simultaneously achieved, indicating that the spin Seebeck effect is comparable to the corresponding charge Seebeck effect.
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    Half-metallic properties, single-spin negative differential resistance, and large single-spin Seebeck effects induced by chemical doping in zigzag-edged graphene nanoribbons” is a paper by Xifeng Yang Wenqian Zhou Xiaodong Hong Yu‐Shen Liu Xuefeng Wang Jian Feng published in 2015. It has an Open Access status of “closed”. You can read and download a PDF Full Text of this paper here.