Magnetism as a mass term of the edge states in graphene

Ken Ichi Sasaki, Riichiro Saito

研究成果: Article査読

19 被引用数 (Scopus)

抄録

The magnetism by the edge states in graphene is investigated theoretically. An instability of the pseudo-spin order of the edge states induces ferrimagnetic order in the presence of the Coulomb interaction. Although the next nearest-neighbor hopping can stabilize the pseudo-spin order, a strong Coulomb interaction makes the pseudo-spin unpolarized and real spin polarized. The magnetism of the edge states makes two peaks of the density of states in the conduction and valence energy bands near the Fermi point. Using a continuous model of the Weyl equation, we show that the edge-induced gauge field and the spin dependent mass terms are keys to make the magnetism of the edge states. A relationship between the magnetism of the edge states and the parity anomaly is discussed.

本文言語English
論文番号054703
ジャーナルjournal of the physical society of japan
77
5
DOI
出版ステータスPublished - 2008 5 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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