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@INPROCEEDINGS{Aldarawsheh:1006622,
      author       = {Aldarawsheh, Amal and Fernandes, Imara Lima and Brinker,
                      Sascha and Sallermann, Moritz and MuayadAbusaa5 and Blügel,
                      Stefan and Lounis, Samir},
      title        = {{E}mergence of zero-field non-synthetic single and
                      catenated antiferromagnetic skyrmions in thin films},
      reportid     = {FZJ-2023-01755},
      year         = {2022},
      abstract     = {Antiferromagnetic (AFM) skyrmions are envisioned as ideal
                      localized topologicalmagnetic bits in future information
                      technologies. In contrast to ferromagnetic (FM)skyrmions,
                      they are immune to the skyrmion Hall effect [1, 2], might
                      offer potential terahertzdynamics [3] while being
                      insensitive to external magnetic fields and dipolar
                      interactions.Although observed in synthetic AFM structures
                      [4] and as complex meronic textures inintrinsic AFM bulk
                      materials [5, 6], their realization in non-synthetic AFM
                      films, of crucialimportance in racetrack concepts, has been
                      elusive. In this work [7], we unveil their presencein a
                      row-wise AFM Cr film deposited on PdFe bilayer grown on fcc
                      Ir(111) surface. Usingfirst-principles, we demonstrate the
                      emergence of single and strikingly interpenetratingcatenated
                      AFM skyrmions, which can coexist with the rich inhomogeneous
                      exchange field,including that of FM skyrmions, hosted by
                      PdFe. Besides the identification of an idealplatform of
                      materials for intrinsic AFM skyrmions, we anticipate the
                      uncovered knottedsolitons to be promising building blocks in
                      AFM spintronics.[1] Barker and Tretiakov, Physical Review
                      Letters 116, 147203 (2016).[2] Zhang, Zhou and Ezawa,
                      Scientific Reports 6, 1 (2016).[3] Gomonay, Baltz, Brataas,
                      Tserkovnyak, Nature Physics 14, 213 (2018).[4] Legrand et
                      al., Nature Materials 19, 34 (2020).[5] Gao et al., Nature
                      586, 37 (2020).[6] Jani et al., Nature 590, 74 (2021).[7]
                      Aldarawsheh et al., ArXiv:2202.12090 (2022).},
      month         = {Sep},
      date          = {2022-09-04},
      organization  = {DPG-Frühjahrstagungen, Regensburg
                       (Germany), 4 Sep 2022 - 9 Sep 2022},
      subtyp        = {Other},
      cin          = {IAS-1 / PGI-1},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106},
      pnm          = {5211 - Topological Matter (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5211},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1006622},
}