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@ARTICLE{Ran:904645,
      author       = {Ran, Kejing and Wang, Jinghui and Bao, Song and Cai,
                      Zhengwei and Shangguan, Yanyan and Ma, Zhen and Wang, Wei
                      and Dong, Zhao-Yang and Cermak, P. and Schneidewind, A. and
                      Meng, Siqin and Lu, Zhilun and Yu, Shun-Li and Li, Jian-Xin
                      and Wen, Jinsheng},
      title        = {{E}vidence for {M}agnetic {F}ractional {E}xcitations in a
                      {K}itaev {Q}uantum-{S}pin-{L}iquid {C}andidate α-{R}u{C}l3},
      journal      = {Chinese physics letters},
      volume       = {39},
      issn         = {0256-307X},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2021-06214},
      pages        = {027501},
      year         = {2022},
      abstract     = {It is known that 𝛼-RuCl3 has been studied extensively
                      because of its proximity to the Kitaev
                      quantum-spin-liquid(QSL) phase and the possibility of
                      approaching it by tuning the competing interactions. Here we
                      present the firstpolarized inelastic neutron scattering
                      study on 𝛼-RuCl3 single crystals to explore the
                      scattering continuum aroundthe 𝛤 point at the Brillouin
                      zone center, which was hypothesized to be resulting from the
                      Kitaev QSL state butwithout concrete evidence. With
                      polarization analyses, we find that, while the spin-wave
                      excitations around the𝑀 point vanish above the transition
                      temperature 𝑇N, the pure magnetic continuous excitations
                      around the 𝛤point are robust against temperature.
                      Furthermore, by calculating the dynamical spin-spin
                      correlation functionusing the cluster perturbation theory,
                      we derive magnetic dispersion spectra based on the
                      𝐾–𝛤 model, whichinvolves with a ferromagnetic Kitaev
                      interaction of −7.2meV and an off-diagonal interaction of
                      5.6 meV. We findthis model can reproduce not only the
                      spin-wave excitation spectra around the 𝑀 point, but also
                      the non-spinwavecontinuous magnetic excitations around the
                      𝛤 point. These results provide evidence for the existence
                      offractional excitations around the 𝛤 point originating
                      from the Kitaev QSL state, and further support the
                      validityof the 𝐾–𝛤 model as the effective minimal
                      spin model to describe 𝛼-RuCl3.},
      cin          = {JCNS-FRM-II / JCNS-2 / JCNS-4 / MLZ / PGI-4 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)JCNS-4-20201012 /
                      I:(DE-588b)4597118-3 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      experiment   = {EXP:(DE-MLZ)PANDA-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000752027200001},
      doi          = {10.1088/0256-307X/39/2/027501},
      url          = {https://juser.fz-juelich.de/record/904645},
}