Spin-selective coupling to Majorana zero modes in mixed singlet and triplet superconducting nanowires

We theoretically investigate the transport properties of a quasi-one-dimensional ferromagnet-superconductor junction where the superconductor consists of mixed singlet and triplet pairings. We show that the relative orientation of the Stoner field ((h) over tilde) in the ferromagnetic lead and the d vector of the superconductor acts like a on-off switch for the zero bias conductance of the device. In the regime, where triplet pairing amplitude dominates over the singlet counterpart (topological phase), a pair of Majorana zero modes appear at each end of the superconducting part of the nanowire. When (h) over tilde is parallel or antiparallel to the d vector, transport gets completely blocked due to blockage in pairingwhile, when (h) over tilde and d are perpendicular to each other, the zero energy two terminal differential conductance spectra exhibits sharp transition from 4e(2)/h to 2e(2)/h as the magnetization strength in the lead becomes larger than the chemical potential indicating the spin-selective coupling of a pair of Majorana zero modes to the lead.