Abstract
Spin-dependent ballistic transport in a mesoscopic three-terminal Y-shaped setup with a spin-discriminating ferromagnetic membrane in one of the outgoing leads is studied using the Landauer–Buttiker formalism. Our calculations, performed at sufficiently low temperatures when thermal effects and magnon scattering become vanishingly small, predict a strong quantum-interference caused enhancement of a spin-filtering effect originally arising due to the band-structure mismatch between the ferromagnetic metal and the lead. Finally, we discuss its possible applications for an efficient injection of a spin-polarized current into a superconductor and for self-controlled spin currents in quantum spintronic networks.
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