Tuning magnetic properties of graphene nanoribbons with topological line defects: From antiferromagnetic to ferromagnetic

Min Kan, Jian Zhou, Qiang Sun, Qian Wang, Yoshiyuki Kawazoe, Puru Jena

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

Zigzag-edged graphene nanoribbons are antiferromagnetic in cross-edge coupling and unsuitable for spintronics applications. Two new strategies of tuning antiferromagnetism (AFM) to ferromagnetism (FM) in graphene nanoribbons are introduced through topological line defects composed of pentagonal and octagonal rings, and their ability to induce magnetic transition is probed by using density functional theory. The resulting exchange energy is found to be large enough for ferromagnetism to be observed at room temperature. Both strategies are experimentally feasible, and the results suggest that defect engineering may provide a novel path to manipulate the magnetic properties of graphene nanoribbons.

Original languageEnglish
Article number155450
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number15
DOIs
Publication statusPublished - 2012 Apr 25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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