Effects of quantum interference on differential conductance and shot noise in ferromagnet-insulator-ferromagnet-d-wave superconductor junctions
铁磁-绝缘层-铁磁-d波超导结中的量子干涉效应对微分电导与散粒噪声的影响

The differential conductance, average current and shot noise power in ferromagnet\|insulator\|ferromagnet\|d\|wave superconductor junctions are studied by solving the Bogoliubov\|de Gennes equations within an extended Blonder\|Tinkham\|Klapwijk scattering formulation. It is shown that both the differential conductance and the shot noise power to average current ratios oscillate with the length of the intermediate ferromagnetic layer, the oscillation amplitude increases with the increase of insulator's barrier height, and decreases with the increase of ferromagnetic exchange splitting in the ferromagnet.