Magnetic nanographite
Koichi Kusakabe, Masanori Maruyama
TL;DR
This paper investigates how hydrogenation induces magnetism in nanographite, revealing that specific hydrogenation patterns create spin-polarized flat bands and magnetic moments in graphene ribbons.
Contribution
It provides a theoretical analysis showing hydrogenation can induce magnetism in nanographite through spin-polarized flat bands at the Fermi level.
Findings
Hydrogenation induces spin-polarized flat bands at the Fermi energy.
Different hydrogenation patterns create magnetic moments.
Theoretical evidence supports hydrogenation as a method to magnetize nanographite.
Abstract
Hydrogenated nanographite can display spontaneous magnetism. Recently we proposed that hydrogenation of nanographite is able to induce finite magnetization. We have performed theoretical investigation of a graphene ribbon in which each carbon is bonded to two hydrogen atoms at one edge and to a single hydrogen atom at another edge. Application of the local-spin-density approximation to the calculation of the electronic band-structure of the ribbon shows appearance of a spin-polarized flat band at the Fermi energy. Producing different numbers of mono-hydrogenated carbons and di-hydrogenated carbons can create magnetic moments in nanographite.
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