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@PHDTHESIS{Zhang:907375,
      author       = {Zhang, Lichuan},
      title        = {{T}opological magnonic properties of two-dimensional
                      magnetic materials},
      volume       = {253},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2022-01997},
      isbn         = {978-3-95806-621-2},
      series       = {Schriften des Forschungszentrums Jülich Reihe
                      Schlüsseltechnologien / Key Technologies},
      pages        = {154 p.},
      year         = {2022},
      note         = {Dissertation, RWTH Aachen University, 2022},
      abstract     = {Spintronics is based on the transport of information by the
                      spin of electronsrather than charge current so as to avoid
                      the Joule heat. Among it,magnons, as the most elementary
                      excitations in magnetic materials, haveemerged as a
                      prominent tool in electrical and thermal manipulation
                      andtransport of spin. Importantly, magnonics as a field is
                      considered as one ofthe pillars of modern spintronics.In
                      this thesis, the linear spin-wave theory is utilized to
                      explore the magnonicproperties based on the effective spin
                      Hamiltonian, parameterizedfrom the first-principles
                      calculations and fitting to experiments. Inspired bythe
                      experimental result, a family of two-dimensional
                      metal-organic frameworkswith the Shastry-Sutherland lattice
                      are calculated from first-principles,and corresponding
                      applications in spintronics and magnonics are investigatedin
                      the thesis. Additionally, combined with inelastic neutron
                      scatteringresults, the magnonic topological properties are
                      systematically exploredin the multiferroic ferrimagnet
                      Cu2OSeO3. The experimental magnon dispersionsare well
                      fitted, when considering the Heisenberg-Dzyaloshinsky-Moriya
                      interaction model, and the Weyl points are forecasted whose
                      positioncan be controlled by changing the
                      Dzyaloshinsky-Moriya interaction ofthe material. Moreover, a
                      measurable thermal Hall conductivity is predicted,which can
                      be associated with the emergence of the Weyl points.Notably,
                      in realistic two-dimensional materials, e.g., ferromagnetic
                      honeycombmaterials, the Dzyloshinskii-Moriya interaction is
                      often accompaniedby the Kitaev interaction, which poses a
                      challenge to distinguish theirmagnitude. In the thesis, we
                      demonstrate that it can be done by accessingmagnonic
                      transport properties and rotating the magnetization in the
                      system.By studying honeycomb ferromagnets that exhibit at
                      the same time theDzyaloshinskii-Moriya interaction and
                      Kitaev interaction, complex magnonictopological properties
                      are revealed accompanied by intricate magnonic
                      transportcharacteristics represented by thermal Hall and
                      magnon Nernst effects.Moreover, the effect of a in-plane
                      magnetic field is investigated, showingthat it can break the
                      symmetry of the system and bring drastic modificationsto
                      magnonic topological transport properties, serving as
                      hallmarks of therelative strength for anisotropic exchange
                      interactions. Furthermore, basedon our proposed strategy,
                      the spin interactions in CrSiTe3 and CrGeTe3 arepredicted
                      and their potential applications in topological magnonics
                      are explored.},
      cin          = {PGI-1 / IAS-1 / JARA-FIT / JARA-HPC},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
      pnm          = {5211 - Topological Matter (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5211},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/907375},
}