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We revisit the ground state of the spin-Fermion model within a semiclassicalapproximation. We demonstrate that antiphase spin spirals, or pi-spirals, whosechirality alternates between consecutive rows (or columns) of local moments,have, for sufficiently high carrier concentration, lower energy than thetraditional Shraiman and Siggia spirals. Furthermore, pi-spirals give rise tomodulated hopping, anisotropic 1D transport, and charge density wave formation.Finally, we discuss the relevance of pi-spirals to the physics of charge stripeformation in cuprates, such as La(2-x)Sr(x)CuO4.Comment: 4 pages, 3 figure

Charge stripe order from antiphase spin spirals in the spin-fermion model