Abstract
Superconductivity of materials with broken mirror symmetry [bulk metals whose symmetry group includes the polar axis $\mathbf{c}$ and two-dimensional (2D) electron systems with perturbed ``up-down'' symmetry] is considered. The broken mirror symmetry makes possible macroscopic effects which would be forbidden in center-symmetric systems. One of such effects, the magnetoelectric effect (MEE), i.e., the occurrence of a spin polarization $\mathbf{M}$ of electrons of a sample when the sample is under dc supercurrent ${\mathbf{J}}_{s}$, is investigated in the case of impure superconductors. It is shown that impurity scattering does not destroy the effect even in the ``dirty'' limit ${T}_{c}\ensuremath{\tau}⪡1$.
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