Using carbon chains to mediate magnetic coupling in zigzag graphene nanoribbons

作者：Kan Min; Zhou Jian; Li Yawei; Sun Qiang^*

来源：Applied Physics Letters, 2012, 100(17): 173106.

DOI：10.1063/1.4705302

Graphene nanoribbon and atomic carbon chain are allotropes of carbon, attracting tremendous attention from multidisciplinary areas ranging from nano physics to astrophysics. Here, first-principles calculations based on density-functional theory are carried out to study the ferromagnetic coupling in zigzag-edged graphene nanoribbons linked by carbon chains. Compared to the existing methods for ferromagnetic graphene nanoribbons, carbon chain linkage is found to be more effective for larger magnetic exchange energy and also be more flexible in tuning the electronic structure and magnetism.

• 出版日期2012-4-23
• 单位北京大学