  We revisit the ground state of the spin-Fermion model within a semiclassical
approximation. We demonstrate that antiphase spin spirals, or pi-spirals, whose
chirality alternates between consecutive rows (or columns) of local moments,
have, for sufficiently high carrier concentration, lower energy than the
traditional Shraiman and Siggia spirals. Furthermore, pi-spirals give rise to
modulated hopping, anisotropic 1D transport, and charge density wave formation.
Finally, we discuss the relevance of pi-spirals to the physics of charge stripe
formation in cuprates, such as La(2-x)Sr(x)CuO4.
