Graphene nanoribbon intercalated with hexagonal boron nitride: Electronic transport properties from ab initio calculations

A magnetic tunnel junction consisting of a boron nitride nanoribbon contacted by two semi-infinite electrodes composed of (3,0) ferromagnetic zig-zag graphene nanoribbons was investigated. Performing spin-polarized ab initio transport calculations based on a scheme that combines non-equilibrium Greenʹs function with density functional theory (NEGF+DFT) we predict that such system could act as spin-filter (the efficiency reaches 50%) and present a magnetoristance of 105%, depending on the length of the boron nitride region.