Bipolar spin-filtering effect in B- or N-doped zigzag graphene nanoribbons with asymmetric edge hydrogenation

作者：Wang, Li-hua; Zhang, Zi-zhen; Zhao, Jian-Guo; Ding, Bing-jun; Guo, Yong^*; Jin, Chun

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2015, 379(43-44): 2860-2865.

DOI：10.1016/j.physleta.2015.09.020

• Density functional theory
• Non-equilibrium Green's function
• Graphene
• Spin-filtering

The spin transport properties of zigzag graphene nanoribbon (ZGNR) hetero-junctions, in which ZGNR electrodes are doped with B or N atoms, are investigated based on spin-polarized density functional theory and non-equilibrium Green's function. ZGNRs are C-H2 bonded at one edge and C-H bonded at the other edge to form asymmetric edge hydrogenation. The spin-polarized currents of ZGNR-based nanodevices with an odd or even number of the zigzag-shaped chains show a perfect bipolar spin-filtering effect on parallel and anti-parallel magnetic configurations. This study provides insights into the design of high-performance graphene-based spin filters.

• 出版日期2015-11-6
• 单位西安交通大学; 中国科学院长春应用化学研究所; 山西大同大学