Nitrogen Doping Position-Dependent Rectification of Spin-Polarized Current and Realization of Multifunction in Zigzag Graphene Nanoribbons with Asymmetric Edge Hydrogenation
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1. School of Physics & Electronic Science and Institute of Applied Chemistry, Shanxi Datong University, Datong, 037009, Shanxi, China 2. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, Shaanxi, China
刊物类别:Chemistry and Materials Science
刊物主题:Chemistry Optical and Electronic Materials Characterization and Evaluation Materials Electronics, Microelectronics and Instrumentation Solid State Physics and Spectroscopy
出版者:Springer Boston
ISSN:1543-186X
文摘
The magnetic and spin transport properties of asymmetric edge-hydrogenated zigzag graphene nanoribbons (ZGNRs) selectively doped with nitrogen atoms were investigated using spin-polarized density functional theory and non-equilibrium Green’s function. Results show that the rectifying performance of spin-polarized current with a ratio higher than 105 can be modulated by changing the positions of the nitrogen dopant. Complete spin filtering (100%) and excellent negative differential resistance behaviors were observed in the ZGNR junctions. These doping position-dependent spin transport characteristics were further tested by shifting from the odd-numbered zigzag-shaped C chains (N Z) to the even-numbered N Z in ZGNRs. This study suggests that adopting a suitable nitrogen doping position could be an effective approach to significantly enhance the rectifying behavior of asymmetric edge-hydrogenated ZGNRs, which are promising materials for multifunctional spintronic devices. Keywords Rectification spin filtering negative differential resistance doping zigzag graphene