Tunneling conductance in ferromagnet/superconductor junctions with time-reversal symmetry breaking

Abstract The tunneling conductance of two kinds of tunnel junctions with time-reversal symmetry breaking, normal metal/insulator/ferromagnetic metal/ d x 2 − y 2 + i s -wave superconductor (NM/I/FM/ d x 2 − y 2 + i s -wave SC) and NM/I/FM/ d x 2 − y 2 + i d x y -wave SC, is calculated using the extended Blonder–Tinkham–Klapwijk theoretical method. The ratio of the subdominant s -wave and d x y -wave components to the dominant d x 2 − y 2 -wave component is expressed by Δ s Δ D and Δ d Δ D , respectively. Results show that for NM/I/FM/ d x 2