Magnetic Properties of Fully Bare and Half-Bare Boron Nitride Nanoribbons

We calculate the electronic structures of the fully bare and half-bare zigzag-edged boron nitride nanoribbons by using density functional theory. We find that the ground states of both the fully bare boron nitride nanoribbons and the boron nitride nanoribbons with a bare N edge and a H-terminated B edge are half-metallic. The alignment of the spin at the bare B edge is antiferromagnetic, while that at the bare N edge is ferromagnetic in the ground states of both the fully bare and half-bare zigzag-edged boron nitride nanoribbons. The H-terminated B or N edge of the half-bare zigzag-edged boron nitride nanoribbon exhibits no magnetism.