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@ARTICLE{Song:827712,
      author       = {Song, Yu and Man, Haoran and Zhang, Rui and Lu, Xingye and
                      Zhang, Chenglin and Wang, Meng and Tan, Guotai and Regnault,
                      L.-P. and Su, Yixi and Kang, Jian and Fernandes, Rafael M.
                      and Dai, Pengcheng},
      title        = {{S}pin anisotropy due to spin-orbit coupling in optimally
                      hole-doped {B}a $_{0.67}$ {K} $_{0.33}$ {F}e $_{2}$ {A}s
                      $_{2}$},
      journal      = {Physical review / B},
      volume       = {94},
      number       = {21},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-01820},
      pages        = {214516},
      year         = {2016},
      abstract     = {We use polarized inelastic neutron scattering to study the
                      temperature and energy dependence of spin space anisotropies
                      in the optimally-hole-doped iron pnictide Ba0.67K0.33Fe2As2
                      (Tc=38 K). In the superconducting state, while the
                      high-energy part of the magnetic spectrum is nearly
                      isotropic, the low-energy part displays a pronounced
                      anisotropy, manifested by a c-axis polarized resonance. We
                      also observe that the spin anisotropy in superconducting
                      Ba0.67K0.33Fe2As2 extends to higher energies compared with
                      electron-doped BaFe2−xTMxAs2 (TM=Co, Ni) and
                      isovalent-doped BaFe2As1.4P0.6, suggesting a connection
                      between Tc and the energy scale of the spin anisotropy. In
                      the normal state, the low-energy spin anisotropy for hole-
                      and electron-doped iron pnictides near optimal
                      superconductivity onset at temperatures similar to the
                      temperatures at which the elastoresistance deviates from
                      Curie–Weiss behavior, pointing to a possible connection
                      between the two phenomena. Our results highlight the
                      relevance of the spin-orbit coupling to the
                      superconductivity of the iron pnictides.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000390906100008},
      doi          = {10.1103/PhysRevB.94.214516},
      url          = {https://juser.fz-juelich.de/record/827712},
}