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