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@INPROCEEDINGS{Schweika:1005624,
      author       = {Schweika, Werner},
      title        = {{C}hiral {S}pin {L}iquid {G}round {S}tate in
                      {YB}a{C}o3{F}e{O}7},
      reportid     = {FZJ-2023-01573},
      year         = {2023},
      abstract     = {A chiral spin liquid state is discovered in the highly
                      frustrated, layered kagome system YBaCo3FeO7 by polarized
                      diffuse neutronscattering [1]. From the antisymmetric part
                      of scattering, related to vector chirality, we determine the
                      chiral correlation function byFourier analysis. The chiral
                      short-range order indicates the emergence of chiral lumps.
                      It can be described by cycloidal waves,which originate from
                      the trigonal sites and extend into the kagome layers. The
                      observed vector chirality agrees with the
                      underlyingantisymmetric Dzialoshinsky-Moriya exchanges
                      arising from broken spatial parity. This chiral spin liquid
                      state is stable down tolowest temperatures despite of strong
                      antiferromagnetic spin exchange. The observation of a
                      possible short-range ordered groundstate raises a
                      fundamental challenge. However, based on the classical
                      theory of magnetic order, we show that such a groundstate
                      may arise from the antisymmetric exchange acting as a
                      frustrating gauge background stabilizing local spin lumps.
                      Thisscenario may appear in many highly frustrated magnetic
                      systems in non-centrosymmetric compounds and has
                      similarities to theavoided phase transition in coupled
                      gauge- and matter-fields for subnuclear particles. [1] W.
                      Schweika, M. Valldor, J. D. Reim, andU. K. Rosler, Chiral
                      Spin Liquid Ground State in YBaCo3FeO7, Phys. Rev. X 12,
                      021029 (2022).},
      month         = {Mar},
      date          = {2023-03-19},
      organization  = {Eighth European Conference on Neutron
                       Scattering, TUM Department of
                       Mechanical Engineering and the new
                       Science Congress Center Munich
                       (Germany), 19 Mar 2023 - 23 Mar 2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / 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},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1005624},
}