Spin transport in graphene - boron nitride hybrid materials with transitional metal impurities

摘要

Spin transport in grapheme-boron nitride nanoribbons with transitional metalimpurities was investigated in the framework of density functional theory calculations.Several structures with substitutional magnetic impurities on boron and nitrogen areinvestigated. Following relaxations, the formation energies are calculated. The ballisticspin currents are obtained using non-equilibrium Green" functions formalism and thespin current polarization is extracted. Relatively high spin current polarizations, as wellas pronounced spin current switching behaviors are obtained, depending on the type ofthe transitional metal impurity. Spin density maps confirm the two types of spin transfercharacteristics.