  We investigate the effect of spin orbit coupling on proximity induced
superconductivity in a normal metal attached to a superconductor. Specifically,
we consider a heterostructure where the presence of interfaces gives rise to a
Rashba spin orbit coupling. The properties of the induced superconductivity in
these systems are addressed within the tunneling Hamiltonian formalism. We find
that the spin orbit coupling induces a mixture of singlet and triplet pairing
and, under specific circumstances, an odd frequency, even parity, spin triplet
pairs can arise. We also address the effect of impurity scattering on the
induced pairs, and discuss our results in context of heterostructures
consisting of materials with spin-momentum locking.
