  We studied the electric current induced in a two-dimensional electron gas by
the spin current, in the presence of Rashba and cubic Dresselhaus spin-orbit
interactions. We found out that the factor relating these currents is not
universal, but rather depends on the origin of the spin current. Drastic
distinction has been found between two cases: the spin current created by
diffusion of an inhomogeneous spin density, and the pure homogeneous spin
current. We found out that in the former case the ISHE electric current is
finite, while it turns to zero in the latter case, if the spin-orbit coupling
is represented by Rashba interaction.
