The study of transport properties in rough ferromagnetic semiconductor rough junctions

► Self-affine interface roughness affects spin filter tunneling structures at low bias. ► Interface roughness described by k-Correlation model and in terms of self-affine scaling Δ, ξ, and H. ► Spin-dependent transmission probability is reduced due to interface roughness. ► Roughness decreases maximum achievable TMR and SP at different temperatures.