We study the tunneling conductance of a ballistic normal metal/ferromagnet/spin-triplet superconductor junction using the extended Blonder-Tinkham-Klapwijk formalism as a model for a c-axis-oriented Au/SrRuO3/Sr2RuO4 junction. We compare chiral p-wave (CPW) and helical p-wave (HPW) pair potentials, combined with ferromagnet magnetization directions parallel and perpendicular to the interface. For fixed θM, where θM is a direction of magnetization in the ferromagnet measured from the c axis, the tunneling conductances of CPW and HPW clearly show different voltage dependencies. It is found that the cases where the d vector is perpendicular to the magnetization direction (CPW with θM=π/2 and HPW with θM=0) are identical. The obtained results serve as a guide to determine the pairing symmetry of the spin-triplet superconductor Sr2RuO4.
|Journal||Physical review B: Covering condensed matter and materials physics|
|Publication status||Published - 13 Jul 2018|