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@INPROCEEDINGS{Bihlmayer:1020988,
      author       = {Bihlmayer, Gustav and Härtl, Patrik and Leisegang, Markus
                      and Bode, Matthias and Blügel, Stefan},
      title        = {{C}onical spin-spirals at a ferromagnet’s surface: a
                      theoretical analysis},
      reportid     = {FZJ-2024-00448},
      year         = {2023},
      abstract     = {The properties of surface layers of a magnetic material can
                      differ substantially from those of the bulk material. A
                      prominent example is the Dzyaloshinskii-Moriya interaction
                      (DMI), resulting from inversion-symmetry breaking at the
                      surface, but also the magnetic anisotropy and the exchange
                      interactions are locally modified. Gd(0001) is here a
                      well-investigated model surface but despite its sensitivity
                      of exchange interactions, experimental data indicated that
                      it behaves as homogeneous Heisenberg system [1]. Recent
                      observations of spin-spirals at the surface of epitaxial
                      Gd(0001) with spin-polarized scanning tunneling microscopy
                      let us re-investigate this system. Density functional theory
                      (DFT) calculations show that not only a sizable DMI can be
                      found at the Gd(0001) surface but also the exchange
                      interactions are modified to drive the system locally into a
                      conical spin-spiral state. Since the magnetic anisotropy and
                      the exchange interactions with the ferromagnetic bulk
                      material disfavor non-collinear magnetic states, only slight
                      modifications of the exchange interactions make these
                      spirals visible. We explore the phase diagram numerically
                      and with the help of atomistic spin-dynamics simulations.[1]
                      C. S. Arnold and D. P. Pappas, Phys. Rev. Lett. 85, 5202
                      (2000)},
      month         = {Mar},
      date          = {2023-03-27},
      organization  = {Frühjahrstagung der DPG (SKM),
                       Dresden (Germany), 27 Mar 2023 - 31 Mar
                       2023},
      subtyp        = {Other},
      cin          = {PGI-1 / IAS-1},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406},
      pnm          = {5211 - Topological Matter (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5211},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1020988},
}