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@ARTICLE{Li:809921,
      author       = {Li, Z. W. and Drees, Y. and Kuo, C. Y. and Guo, H. and
                      Ricci, A. and Lamago, D. and Sobolev, O. and Rütt, U. and
                      Gutowski, O. and Pi, T. W. and Piovano, A. and Schmidt, W.
                      and Mogare, K. and Hu, Z. and Tjeng, L. H. and Komarek, A.
                      C.},
      title        = {{I}ncommensurate spin correlations in highly oxidized
                      cobaltates {L}a$_{2−x}${S}r$_{x}${C}o{O}$_{4}$},
      journal      = {Scientific reports},
      volume       = {6},
      issn         = {2045-2322},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2016-02829},
      pages        = {25117 -},
      year         = {2016},
      abstract     = {We observe quasi-static incommensurate magnetic peaks in
                      neutron scattering experiments on layered cobalt oxides
                      La2−xSrxCoO4 with high Co oxidation states that have been
                      reported to be paramagnetic. This enables us to measure the
                      magnetic excitations in this highly hole-doped
                      incommensurate regime and compare our results with those
                      found in the low-doped incommensurate regime that exhibit
                      hourglass magnetic spectra. The hourglass shape of magnetic
                      excitations completely disappears given a high Sr doping.
                      Moreover, broad low-energy excitations are found, which are
                      not centered at the incommensurate magnetic peak positions
                      but around the quarter-integer values that are typically
                      exhibited by excitations in the checkerboard charge ordered
                      phase. Our findings suggest that the strong inter-site
                      exchange interactions in the undoped islands are critical
                      for the emergence of hourglass spectra in the incommensurate
                      magnetic phases of La2−xSrxCoO4.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL},
      ddc          = {000},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-ILL-20110128},
      pnm          = {144 - Controlling Collective States (POF3-144) / 524 -
                      Controlling Collective States (POF3-524) / 6212 - Quantum
                      Condensed Matter: Magnetism, Superconductivity (POF3-621) /
                      6213 - Materials and Processes for Energy and Transport
                      Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
                      G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
                      G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)PUMA-20140101 / EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000374858800002},
      pubmed       = {pmid:27117928},
      doi          = {10.1038/srep25117},
      url          = {https://juser.fz-juelich.de/record/809921},
}