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

Authors

Min Kan, Peking University
Jian Zhou, Peking University
Qiang Sun, Virginia Commonwealth University
Qiang Wang, Peking University
Yoshiyuki Kawazoe, Tohoku University
Puru Jena, Virginia Commonwealth UniversityFollow

Document Type

Article

Original Publication Date

2012

Journal/Book/Conference Title

Physical Review B

Volume

85

Issue

15

DOI of Original Publication

10.1103/PhysRevB.85.155450

Comments

Originally published by the American Physical Society at: http://dx.doi.org/10.1103/PhysRevB.85.155450

Date of Submission

April 2015

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.

Rights

Kan, M., Zhou, J., Sun, Q., et al. Tuning magnetic properties of graphene nanoribbons with topological line defects: From antiferromagnetic to ferromagnetic. Physical Review B, 85, 155450 (2012). Copyright © 2012 American Physical Society.

Is Part Of

VCU Physics Publications