  A key concept in the emerging field of spintronics is the electric field
control of spin precession via the effective magnetic field generated by the
Rashba spin orbit interaction (RSOI). Here, by extensive Density Matrix
Renormalization Group computations, we demonstrate the presence of alternating
spin current order in the gapped phases of a quantum wire with spatially
modulated RSOI and repulsive electron-electron interactions. Our results are
analytically supported by bosonization and by a mapping to a locally rotated
spin basis.
