Theory of interedge superexchange in zigzag edge magnetism

J. Jung, T. Pereg-Barnea, A. H. MacDonald

Research output: Contribution to journalArticlepeer-review

140 Scopus citations


A graphene nanoribbon with zigzag edges has a gapped magnetic ground state with an antiferromagnetic interedge superexchange interaction. We present a theory based on asymptotic properties of the Dirac-model ribbon wave function which predicts W-2 and W-1 ribbon-width dependencies for the superexchange interaction strength and the charge gap, respectively. We find that, unlike the case of conventional atomic-scale superexchange, opposite spin orientations on opposite edges of the ribbon are favored by both kinetic and interaction energies.

Original languageEnglish
Article number227205
JournalPhysical Review Letters
Issue number22
StatePublished - 5 Jun 2009


Dive into the research topics of 'Theory of interedge superexchange in zigzag edge magnetism'. Together they form a unique fingerprint.

Cite this