Magnetism in hybrid carbon nanostructures : nanobuds

Abstract

The robust magnetic state of recently synthesized hybrid carbon nanostructures, i.e., nanobuds, is predicted

through comprehensive spin-polarized density-functional calculations. The effects of chirality, curvature, and

topology on the magnetism of nanobuds are scrutinized by detailed electronic structure analysis. The substantial

emergent amounts of unpaired spins originate in the presence of carbon radicals introduced by the

geometry-induced electronic frustration. The location of radicals is mainly on the nanotube surface within the

connecting region with fullerene, rather than surfaces with negative Gaussian curvature. The magnetic

nanobuds hold great promise in the field of spintronics owing to their ready accessibility by experimental

synthesis and fabrication.