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@ARTICLE{Grytsiuk:894438,
      author       = {Grytsiuk, Sergii and Blügel, S.},
      title        = {{M}icromagnetic description of twisted spin spirals in the
                      {B}20 chiral magnet {F}e{G}e from first principles},
      journal      = {Physical review / B},
      volume       = {104},
      number       = {6},
      issn         = {2469-9969},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2021-03220},
      pages        = {064420},
      year         = {2021},
      abstract     = {Using the model of classical Heisenberg exchange and
                      Dzyaloshinskii-Moriya (DM) interaction, we show that the
                      ground state of the B20 FeGe chiral magnet is a
                      superposition of twisted helical spin-density waves formed
                      by different sublattices of the crystal. Such twisted
                      spin-density waves propagate in the same direction but with
                      different phases and different directions of the rotation
                      axes. We derive an advanced micromagnetic expression
                      describing the exchange and DM interaction for such magnetic
                      structures. In particular, we show that such magnetic order
                      gives rise to new contributions to the micromagnetic
                      energies of the exchange and DM interactions. By employing
                      first-principles calculations based on density functional
                      theory and using our micromagnetic model we show that the
                      magnitude of the spin-spiral twist in B20 FeGe is of the
                      same order as global spiraling. While the energy difference
                      between the ground state of twisted spirals and the
                      ferromagnetic state is in good agreement with the
                      experimental results, for the spin spirals without a twist
                      it is smaller by a factor of 3. In addition, we verify our
                      results by employing spin-dynamics simulations. This calls
                      for new experiments exploring the ground state properties of
                      B20 chiral magnets.},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
      pnm          = {5211 - Topological Matter (POF4-521) / Magnetic Skyrmions
                      from first-principles $(jara0161_20191101)$},
      pid          = {G:(DE-HGF)POF4-5211 / $G:(DE-Juel1)jara0161_20191101$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000684129900001},
      doi          = {10.1103/PhysRevB.104.064420},
      url          = {https://juser.fz-juelich.de/record/894438},
}