Parallel spin stripes and their coexistence with superconducting ground states at optimal and high doping in La 1.6 − x Nd 0.4 Sr x CuO 4

The authors show the existence of the parallel spin stripe order in the optimal and over-doped region of La${}_{1.6\ensuremath{-}x}$Nd${}_{0.4}$Sr${}_{x}$CuO${}_{4}$ at low temperatures