Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Top view of graphene doped with nitrogen at a concentration of 6.25 at. %. Positive (negative) spin densities are plotted in blue (red) for isosurfaces at ±5 × 10–4eÅ–3: (a) 0.1, (b) 0.4, (c) 0.7, (d) 0.8, (e) 0.4, and (f) 0.6 μB per supercell.
