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@ARTICLE{Kunkemller:834219,
      author       = {Kunkemöller, S. and Komleva, E. and Streltsov, S. V. and
                      Hoffmann, S. and Khomskii, D. I. and Steffens, P. and Sidis,
                      Y. and Schmalzl, K. and Braden, M.},
      title        = {{M}agnon dispersion in {C}a2{R}u1−x{T}ix{O}4: {I}mpact of
                      spin-orbit coupling and oxygen moments},
      journal      = {Physical review / B},
      volume       = {95},
      number       = {21},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-04201},
      pages        = {214408},
      year         = {2017},
      abstract     = {The magnon dispersion of Ca2RuO4 has been studied by
                      polarized and unpolarized neutron scattering experiments on
                      crystals containing 0, 1, and $10\%$ of Ti. Ti is inserted
                      in order to enable the growth of large, partially detwinned
                      crystals. One percent of Ti has a negligible impact on
                      structural and magnetic properties. Also for $10\%$ Ti
                      content magnetic properties still change very little, but
                      the insulating phase is stabilized up to at least 700 K and
                      structural distortions are reduced. The full dispersion of
                      transverse magnons studied for $1\%$ Ti substitution can be
                      well described by a conventional spin-wave model with
                      interaction and anisotropy parameters that agree with
                      density functional theory calculations. Spin-orbit coupling
                      strongly influences the magnetic excitations, as it is most
                      visible in large energies of the magnetic zone-center modes
                      arising from magnetic anisotropy. Additional modes appear at
                      low energy near the antiferromagnetic zone center and can be
                      explained by a sizable magnetic moment of 0.11 Bohr
                      magnetons, which the density functional theory calculations
                      find located on the apical oxygens. The energy and the
                      signal strength of the additional branch are well described
                      by taking into account this oxygen moment with weak
                      ferromagnetic coupling to the Ru moments.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL},
      ddc          = {530},
      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-Juel1)ILL-IN12-20150421},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000403069600006},
      doi          = {10.1103/PhysRevB.95.214408},
      url          = {https://juser.fz-juelich.de/record/834219},
}