Strain-induced ferromagnetism in zigzag edge graphene nanoribbon with a topological line defect

Ting Hu, Jian Zhou, Jinming Dong, Yoshiyuki Kawazoe

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

The electronic and magnetic properties of the zigzag edge graphene nanoribbon with a topological line defect (LD-ZGNR) have been studied under an external strain along ribbon axis by using first-principle calculations. It is found that the applied strain induces the local magnetic moments on the line defect, whose coupling with those on the edges leads to a turnover of the spin polarization on one edge, making the LD-ZGNR become a ferromagnetic (FM) metal at a large enough strain. When the strain increases to larger than 16%, a transition from a FM metal to a FM semiconductor will happen. Our calculation results suggest a possible way to tune the magnetic and transport properties of the LD-ZGNR by applying the strain, which is very useful for applications of the graphene ribbon in spintronics and electromechanical devices.

Original languageEnglish
Article number125420
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number12
DOIs
Publication statusPublished - 2012 Sep 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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