"Collective magnetic behavior of graphene nanohole superlattices" by Decai Yu, Elizabeth M. Lupton et al.

Article Title

Collective magnetic behavior of graphene nanohole superlattices

Authors

Decai Yu, Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA
Elizabeth M. Lupton, Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA
Miao Liu, Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA
Wei Liu, Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA
Feng Liu, Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA

Keywords

Graphene, magnetism, spin, magnetic semiconductor, superlattice

Abstract

We predict a new class of 2-D crystalline “bulk” magnets—the graphene nanohole (GNH) superlattices with each GNH acting like a “super” magnetic atom, using first principles calculations. We show that such superlattices can exhibit long-range magnetic order above room temperature, with a collective magnetic behavior governed by inter-NH spin spin interactions in additional to intra-NH spin ordering. Furthermore, magnetic semiconductors can be made by doping magnetic NHs into semiconducting NH superlattices. The possibility of engineering magnetic GNHs for storage media and spintronics applications is discussed.