Negative differential spin conductance in doped zigzag graphene nanoribbons

Ting Ting Wu; Xue Feng Wang; Ming Xing Zhai; Hua Liu; Liping Zhou; Yong Jin Jiang

doi:10.1063/1.3681775

Negative differential spin conductance in doped zigzag graphene nanoribbons

Ting Ting Wu, Xue Feng Wang, Ming Xing Zhai, Hua Liu, Liping Zhou, Yong Jin Jiang

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Abstract

The spin dependent charge transport in zigzag graphene nanoribbons (ZGNRs) has been investigated by the nonequilibrium Green's function method combined with the density functional theory at the local spin density approximation. The current versus voltage curve shows distinguished behaviors for symmetric and asymmetric ZGNRs, and the doping on the ZGNR edges can manipulate the spin transport. In special cases that a Be atom is substitutionally doped on one edge of the symmetric ZGNRs, one spin current shows negative differential resistance, whereas the other increases monotonically with the bias. This property might be used to design spin oscillators or other devices for spintronics.

Original language	English (US)
Article number	052112
Journal	Applied Physics Letters
Volume	100
Issue number	5
DOIs	https://doi.org/10.1063/1.3681775
State	Published - Jan 30 2012
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11074182, 10804080, and 91121021) and Natural Science Foundation of ZheJiang Province, China (Grant No. 7080383). Part of the calculations was performed at the Center for Computational Science of CASHIPS.

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abstract = "The spin dependent charge transport in zigzag graphene nanoribbons (ZGNRs) has been investigated by the nonequilibrium Green's function method combined with the density functional theory at the local spin density approximation. The current versus voltage curve shows distinguished behaviors for symmetric and asymmetric ZGNRs, and the doping on the ZGNR edges can manipulate the spin transport. In special cases that a Be atom is substitutionally doped on one edge of the symmetric ZGNRs, one spin current shows negative differential resistance, whereas the other increases monotonically with the bias. This property might be used to design spin oscillators or other devices for spintronics.",

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note = "Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 11074182, 10804080, and 91121021) and Natural Science Foundation of ZheJiang Province, China (Grant No. 7080383). Part of the calculations was performed at the Center for Computational Science of CASHIPS.",

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AU - Wu, Ting Ting

AU - Wang, Xue Feng

AU - Zhai, Ming Xing

AU - Liu, Hua

AU - Zhou, Liping

AU - Jiang, Yong Jin

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 11074182, 10804080, and 91121021) and Natural Science Foundation of ZheJiang Province, China (Grant No. 7080383). Part of the calculations was performed at the Center for Computational Science of CASHIPS.

PY - 2012/1/30

Y1 - 2012/1/30

N2 - The spin dependent charge transport in zigzag graphene nanoribbons (ZGNRs) has been investigated by the nonequilibrium Green's function method combined with the density functional theory at the local spin density approximation. The current versus voltage curve shows distinguished behaviors for symmetric and asymmetric ZGNRs, and the doping on the ZGNR edges can manipulate the spin transport. In special cases that a Be atom is substitutionally doped on one edge of the symmetric ZGNRs, one spin current shows negative differential resistance, whereas the other increases monotonically with the bias. This property might be used to design spin oscillators or other devices for spintronics.

AB - The spin dependent charge transport in zigzag graphene nanoribbons (ZGNRs) has been investigated by the nonequilibrium Green's function method combined with the density functional theory at the local spin density approximation. The current versus voltage curve shows distinguished behaviors for symmetric and asymmetric ZGNRs, and the doping on the ZGNR edges can manipulate the spin transport. In special cases that a Be atom is substitutionally doped on one edge of the symmetric ZGNRs, one spin current shows negative differential resistance, whereas the other increases monotonically with the bias. This property might be used to design spin oscillators or other devices for spintronics.

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Negative differential spin conductance in doped zigzag graphene nanoribbons

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