Charge order in La_{1.8-x}Eu_{0.2}Sr_xCuO_4 studied by resonant soft   X-ray diffraction
  Resonant soft X-ray scattering with photon energies near the O K and the Cu L3 edges was used to study charge ordering in the system La_{1.8-x}Eu_{0.2}Sr_xCuO_4 as a function of temperature for x = 0.125 and 0.15. From the superstructure diffraction intensities a charge ordering with a doping dependent wave vector is derived which is in this system well below the transition temperature of the low-temperature tetragonal phase but well above the onset of spin ordering. This indicates that charge ordering is the primary driving force for the formation of stripe-like phases in two-dimensional doped cuprates. Analysis of the lineshape of the scattered intensity as a function of photon energy yields evidence for a high hole concentration in the stripes. 
J. Fink, E. Schierle, E. Weschke, J. Geck, D. Hawthorn, H. Wadati,   H.-H. Hu, H. A. Durr, N. Wizent, B. Buchner, G.A. Sawatzky