Conformational effect on spin filtration through a multi-terminal magnetic helix

Abstract

We investigate spin dependent electron transport through a magnetic helix (MH) which is coupled to one input and two output leads. Suitably adjusting the physical parameters and lead positions we can achieve high degree of spin polarizations with opposite phase at the output terminals. We consider both long-range and short-range hopping magnetic helices and critically examine the interplay between these hopping integrals on spin polarization. From our results we find that the long-range hopping MH is much superior than the short-range one. Simulating the quantum system within a tight-binding framework we compute spin dependent transmission probabilities and spin polarization co-efficient using the well known Green’s function formalism. Our proposition can provide a deeper impact in realizing efficient spin based devices in near future.