Generalization of de Gennes factor for the strong spin-orbit coupled systems.

ORAL

Abstract

The magnetic exchange interaction parameters of magnetic systems can be obtained from the consideration of energetics within density functional theory (DFT)-based approaches. Spin Hamiltonians, such as the Heisenberg model, are mainly used to fit the various total energies of magnetic configurations obtained from DFT band calculations, which can be directly compared to the experimental findings including spin-wave dispersions. However, for the strong spin-orbit coupled systems, these approaches often fail and predict wrong energy scales compared to the experimental values due to the entanglement of spin and orbital moments. By including the generalized de Gennes factor, which connects the spin and orbital moments to the total moment, we have found that the better description of exchange interaction parameters can be obtained for the strong spin-orbit coupled systems.

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Presenters

  • Hoshin Gong

    • Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea

Authors

  • Hoshin Gong

    • Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea

  • Kyoo Kim

    • Physics, POSTECH
    • Max Planck-POSTECH/Hsinchu Center for Complex Phase Materials
    • MPPC_CPM, Pohang University of Science and Technology, Pohang, 37673, Korea

  • Sungdae Ji

    • MPPC_CPM, Pohang University of Science and Technology, Pohang, 37673, Korea
    • Max Planck POSTECH/Korea

  • Bongjae Kim

    • Physics, Kunsan National University
    • Department of Physics, Kunsan National University, Gunsan, 54150, Korea

  • Byung Il Min

    • Pohang University of Science and Technology
    • physics, Pohang University of Science and Technology
    • Department of Physics, Pohang University of Science and Technology
    • Department of Physics, Pohang University of Science and Technology (POSTECH)
    • Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea