Fig. 1.
Long-range stripe structure in real-space. (A) Crystal structure of bilayer manganite La2-2xSr1+2xMn2O7 with La/Sr (purple) atoms between MnO6 octahedra (Mn: blue, O: red). (B) Phase diagram of La2-2xSr1+2xMn2O7, from refs. 15, 16. (C) CE ordering at x = 0.50 and (D) Bistripe ordering at x = 0.60. Red arrows indicate electron hopping paths, which are broken in the x = 0.60 bi-stripe phase. The doping and temperature of our study is indicated by the blue arrow in box B, with x ∼ 0.59 and Tc ∼ 160 K.