Campbell, B.J.Rosenkranz, S.Kang, H.J.Stokes, H.T.Chupas, P.J.Komiya, S.Ando, Y.Li, ShiliangDai, Pengcheng2015-10-132015-10-132015Campbell, B.J., Rosenkranz, S., Kang, H.J., et al.. "Long-range two-dimensional superstructure in the superconducting electron-doped cuprate Pr0.88LaCe0.12CuO4." <i>Physical Review B,</i> 92, (2015) American Physical Society: 014118. http://dx.doi.org/10.1103/PhysRevB.92.014118.https://hdl.handle.net/1911/81884Utilizing single-crystal synchrotron x-ray scattering, we observe distorted CuO2 planes in the electron-doped superconductor Pr1−xLaCexCuO4+δ, x = 0.12. Resolution-limited rods of scattering are indicative of a long-range two-dimensional 22√×22√ superstructure in the a−b plane, adhering to planar space-group symmetry p4gm, which is subject to stacking disorder perpendicular to the planes. This superstructure is present only in annealed, superconducting samples, but not in the as-grown, nonsuperconducting samples. These long-range distortions of the CuO2 planes, which are generally considered to be detrimental to superconductivity, have avoided detection to date due to the challenges of observing and interpreting subtle diffuse-scattering features.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1103/PhysRevB.92.014118