The correct composition of the Eu-doped LSCO single crystals obtained in both growth experiments described in the Article is La_1.72Eu_0.2Sr_0.08CuO₄. The images and data shown in Figures 2–6 correspond to a composition of La_1.72Eu_0.2Sr_0.08CuO₄ instead of La_1.66Eu_0.2Sr_0.14CuO₄. The data shown in Table 1 in the original publication do not correspond to the samples shown in Figures 2–6 but to different batches with composition La_1.66Eu_0.2Sr_0.14CuO₄.SC1.1: single crystal, obtained in the first growth at a laser power of 10.5%; SC1.2: single crystal, obtained in the first growth at a laser power of 11.0%; and SC2: single crystal, obtained in the second growth at a laser power of 10.5%. The compositional data for the studied samples are presented in the corrected Table 1 herein and are in good agreement with the nominal feed rod composition. As the refinement of the XRD data originally presented in the paper was performed assuming a composition of La_1.66Eu_0.2Sr_0.14CuO₄, we carried out a new refinement of these data using the correct composition, La_1.72Eu_0.2Sr_0.08CuO₄. The results of the new refinement are provided in Table 2. Note that the values obtained for the lattice parameters a, b and c remain unchanged, and only slight differences are observed in the values of the displacement parameters for the atoms in sites 8f and 4a.