Electric field effects in zigzag edged graphene nanoribbons

Takao Nomura*, Daisuke Yamamoto, Susumu Kurihara

*この研究の対応する著者

研究成果: Article査読

10 被引用数 (Scopus)

抄録

We investigate the magnetic ordering in zigzag edged graphene nanoribbons under cross-ribbon electric fields by using the Hubbard model within the unrestricted Hatree-Fock approximation. In the absence of applied electric field, the ground state is an "edge-magnetized state" with magnetic moments mainly localized on the edges, where the moments on the two edges are mutually antiparallel. Under electric fields, we find that the band gap near the Fermi level becomes spin dependent. On increasing the strength of the electric field, the biased charge distribution decreases or increases the band gap with respect to the majority spin on each edge. Increasing the strength further, the system becomes half-metalic, and finally the magnetization completely disappears.

本文言語English
論文番号062015
ジャーナルJournal of Physics: Conference Series
200
SECTION 6
DOI
出版ステータスPublished - 2010

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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