ترابرد كوانتومي همدوس در اتصالات گرافيني فرومغناطيس - ابررسانا - فرومغناطيس

Coherent quantum trasport in ferromagnet-superconductor-ferromagnet graphene junctions

In this paper, we investigate the coherent quantum transport in grapheme-based ferromagnet-superconductor- ferromagent junctions within the framework of BCS theory using DBdG quasiparticles equation .The coherency with the finite size of superconductor region has two characteristic features; subgap electron transport and oscillations of differential conductance, we show that periodic vanishing of the Andreev reflection at the energies called geometrical resonances above the superconducting gap is a striking consequence of quasiparticles interference. We suggest to make devices that produce polarized spin-current with possible applications in spintronics.