QUANTUM NANORING WITH TWO MAGNETIC IMPURITIES AS A SPIN-POLARIZER
Based on a single-band waveguide theory, we investigate electronic and spintronic properties of a single electron in a quantum nano-ring with two magnetic impurities. We find that the quantum ring with magnetic impurities can act as a spin-polarizer. We also study efficiency of the spin-polarizer and find out that it can be above 65%.