Spin-polarized-current switching mediated by Majorana bound states

Val'kov, V. V.; Aksenov, S., V Source: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 465 88-92; 10.1016/j.jmmm.2018.04.043 NOV 1 2018

We present the study of transport properties of a superconducting wire with strong Rashba spin-orbit coupling for different orientations of an external magnetic field. Using the nonequilibrium Green’s functions in the tight-binding approach the crucial impact of the relative alignment of lead magnetization and the Majorana bound state (MBS) spin polarization on the low-bias conductance and shot noise is presented. Depending on this factor the transport regime can effectively vary from symmetric to extremely asymmetric. In the last situation the suppression of MBS-assisted conductance results in current-switch effect allowing the electrical detection of the Majorana fermions.