Abstract

We investigate theoretically the nonlocal conductance arising from the crossed Andreev reflection and electron elastic cotunneling processes in a topological insulator ferromagnet/d-wave superconductor/ferromagnet (F/d-wave SC/F) junction with in-plane magnetization. We find that these nonlocal conductances depend strongly on the d-wave superconducting orientation angular α. The effect of the bias voltage on the crossed Andreev reflection and electron elastic cotunneling is also investigated. Except forα=π/4 case, where crossed Andreev reflection conductance is negligibly small, a perfect crossed Andreev reflection can be obtained in the anti-parallel magnetization configuration by proper tuning of the bias voltage.