期刊
APPLIED PHYSICS LETTERS
卷 103, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4821954
关键词
-
资金
- National Basic Research Program of China (973 Program) [2011CB925602]
- Shenzhen Basic Research Grants [JCYJ20120615142933076]
Within the framework of Hubbard model, a bowtie-shaped graphene nanoflake is identified to undergo an electric-field induced phase transition from an antiferromagnetic ground state. Unlike the case of half-metallic graphene nanoribbons, the electric field here leads to a non-magnetic state instead of ferromagnetic state after destructing the antiferromagnetic ordering. Because the spin is polarized on different sublattices of the nanodot in the antiferromagnetic phase, the transition occurs when the applied field breaks the sublattice symmetry and induces enough energy splitting among the originally degenerate zero-energy states. (C) 2013 AIP Publishing LLC.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据