Thampy, V.7; Dean, M. P. M.7; Christensen, Niels Bech1; Steinke, L.7; Islam, Z.8; Oda, M.9; Ido, M.9; Momono, N.6; Wilkins, S. B.7; Hill, J. P.7
1 Department of Physics, Technical University of Denmark2 Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark3 Brookhaven National Laboratory4 Argonne National Laboratory5 Hokkaido University6 Muroran Institute of Technology7 Brookhaven National Laboratory8 Argonne National Laboratory9 Hokkaido University
We report the observation of a bulk charge modulation in La1.88Sr0.12CuO4 (LSCO) with a characteristic in-plane wave vector of (0.236,±δ), with δ=0.011 r.l.u. The transverse shift of the ordering wave vector indicates the presence of rotated charge-stripe ordering, demonstrating that the charge ordering is not pinned to the Cu-O bond direction. On cooling through the superconducting transition, we find an abrupt change in the growth of the charge correlations and a suppression of the charge order parameter indicating competition between the two orderings. Orthorhombic LSCO thus helps bridge the apparent disparities between the behavior previously observed in the tetragonal “214” cuprates and the orthorhombic yttrium and bismuth-based cuprates and thus lends strong support to the idea that there is a common motif to charge order in all cuprate families.
Physical Review B (condensed Matter and Materials Physics), 2014, Vol 90, Issue 10