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@ARTICLE{Drees:186544,
      author       = {Drees, Y. and Li, Z. W. and Ricci, A. and Rotter, M. and
                      Schmidt, W. and Lamago, D. and Sobolev, O. and Rütt, U. and
                      Gutowski, O. and Sprung, M. and Piovano, A. and Castellan,
                      J. P. and Komarek, A. C.},
      title        = {{H}our-glass magnetic excitations induced by nanoscopic
                      phase separation in cobalt oxides},
      journal      = {Nature Communications},
      volume       = {5},
      issn         = {2041-1723},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2015-00618},
      pages        = {5731},
      year         = {2014},
      abstract     = {The magnetic excitations in the cuprate superconductors
                      might be essential for an understanding of high-temperature
                      superconductivity. In these cuprate superconductors the
                      magnetic excitation spectrum resembles an hour-glass and
                      certain resonant magnetic excitations within are believed to
                      be connected to the pairing mechanism, which is corroborated
                      by the observation of a universal linear scaling of
                      superconducting gap and magnetic resonance energy. So far,
                      charge stripes are widely believed to be involved in the
                      physics of hour-glass spectra. Here we study an
                      isostructural cobaltate that also exhibits an hour-glass
                      magnetic spectrum. Instead of the expected charge stripe
                      order we observe nano phase separation and unravel a
                      microscopically split origin of hour-glass spectra on the
                      nano scale pointing to a connection between the magnetic
                      resonance peak and the spin gap originating in islands of
                      the antiferromagnetic parent insulator. Our findings open
                      new ways to theories of magnetic excitations and
                      superconductivity in cuprate superconductors.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL},
      ddc          = {500},
      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          = {422 - Spin-based and quantum information (POF2-422) / 424 -
                      Exploratory materials and phenomena (POF2-424) / 542 -
                      Neutrons (POF2-542) / 544 - In-house Research with PNI
                      (POF2-544) / 54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-422 / G:(DE-HGF)POF2-424 /
                      G:(DE-HGF)POF2-542 / G:(DE-HGF)POF2-544 /
                      G:(DE-HGF)POF2-54G24},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000347174600001},
      pubmed       = {pmid:25534540},
      doi          = {10.1038/ncomms6731},
      url          = {https://juser.fz-juelich.de/record/186544},
}