Giant spin-splitting and orbital angular momentum in triangular lattice

ORAL

Abstract

We study the spin-splitting in triangular-lattice materials including Au (111) surface and transition-metal dichalcogenides quantitatively as well as qualitatively using tight-binding calculations and first-principles calculations. To analyze the spin-splitting of the bands, we calculate the orbital angular momentum (OAM) and consider the symmetry of the system. We confirm that the giant spin-splitting results from the presence of significant local OAMs and strong spin-orbit interactions in the vicinity of high-atomic number elements. This work was supported by NRF of KOREA (Grant No. 2011-0018306) and KISTI supercomputing center (Project No. KSC-2013-C3-062).

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Authors

  • Sehoon Oh

    • Department of Physics, IPAP, and Center for Computational Studies of Advanced Electronic Material Properties, Yonsei University, Seoul, Korea

  • Hyoung Joon Choi

    • Center for Computational Studies of Advanced Electronic Material Properties, Yonsei University
    • Department of Physics, IPAP, and Center for Computational Studies of Advanced Electronic Material Properties, Yonsei University, Seoul, Korea
    • Center for Computational Studies of Advanced Electronic Material Properties (CCSAEMP) and Department of Physics, Yonsei University, Korea