  We analyze the effect of magnetic fluctuations in superconductors with strong
spin-orbit coupling and show that they drive a phase transition between two
superconducting states: a conventional phase with zero center-of-mass momentum
of Cooper pairs, and an exotic phase with non-zero pair momentum. The latter is
found to exhibit persistent currents without magnetic field in doubly connected
geometries such as rings. Surprisingly, the transition temperature into the
superconducting state can be increased by applying a Zeeman magnetic field.
