Abstract
The half-metallic behavior of Au–V(Cr) quantum wires adsorbed on an armchair (5, 5)boron nitride nanotube is obtained by performing spin-polarized density functionalcalculations. The density of states shows a metallic property at the Fermi level for themajority spin channel and a semiconductor gap in the minority spin channel. Thehalf-metallic behavior of the quantum wire/nanotube complex originates from thehalf-metallic behavior of the free-standing Au–V(Cr) quantum wires. The calculations ofspin-polarized transport indicate that such a one-dimensional half-metallic magnet can beused as a spin filter.
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