Communication: Emergence of localized magnetic moment at adsorbed beryllium dimer on graphene

Abstract

Graphene with significant and stable magnetic moment is expected to have various promising applications in electronics. The conventional way to magnetize graphene is to dope paramagnetic adsorbates onto it. However, this method usually induces fractional charge transfer, which decreases the total magnetic moment. Contrary to the conventional way and widely held point of view that diamagnetic adsorbates are weak dopants, for the first time we report our theoretical findings that doping the diamagnetic beryllium dimer on perfect diamagnetic graphene produces a stable system with a local magnetic moment as large as 1 B. It is revealed that this process is realized through the spin-polarized electron transfer. © 2010 American Institute of Physics.