Journal
PHYSICAL REVIEW B
Volume 88, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.205422
Keywords
-
Funding
- Ministry of Earth Science
- Department of Science and Technology, India
Ask authors/readers for more resources
We present a first-principles investigation of the electronic and magnetic properties of an adatom on bilayer graphene within the framework of density functional theory. In particular, we study the influence of an applied gate voltage which modifies the electronic states of the bilayer graphene as well as shifts the adatom energy states relative to that of the graphene energy states. Our study carried out for a choice of three different adatoms, Na, Cu, and Fe, shows that the nature of adatom-graphene bonding evolves from ionic to covalent, in moving from an alkali metal, Na, to a transition metal, Cu or Fe. This leads to the formation of magnetic moments in the latter cases (Cu, Fe) and the absence of a magnetic moment in the former (Na). Application of an external electric field to bilayer graphene completely changes the scenario, switching on a magnetic moment for the Na adatom, and switching off the magnetic moments for Cu and Fe adatoms. Our results have important implications for fundamental studies of controlled adatom magnetism and spintronics applications in nanotechnology.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available