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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• 作者：Lihua Wang ; Zizhen Zhang ; Jianguo Zhao ; Bingjun Ding…
• 关键词：Rectification ; spin filtering ; negative differential resistance ; doping ; zigzag graphene
• 刊名：Journal of Electronic Materials
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：45
• 期：2
• 页码：1165-1174
• 全文大小：2,388 KB
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• 作者单位：Lihua Wang (1)
  Zizhen Zhang (1)
  Jianguo Zhao (1)
  Bingjun Ding (2)
  Yong Guo (1)
  
  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