Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 106: Electronic Structure of Surfaces: Spectroscopy, Surface States III
O 106.10: Vortrag
Freitag, 24. März 2017, 12:45–13:00, WIL C107
First-principles calculations on the surface and bulk electronic structure of TaAs — •Minkyu Shim1, Jae Hyun Bae1,2, Jisoon Ihm1,3, and Cheol-Hwan Park1 — 1Department of Physics and Astronomy, Seoul National University, Seoul 08826, South Korea — 2Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, South Korea — 3Department of Physics, Pohang University of Science and Technology, Pohang 37673, South Korea
Weyl semimetals are a new class of materials whose low-energy electronic excitations are described by the Weyl equation. In this presentation, we discuss the electronic structure of one of the most commonly-known Weyl semimetals, TaAs [1,2], obtained through first-principle calculations. We analyze both the bulk and Fermi arc states of this material. Our work presents a comprehensive understanding of the topological surface states of TaAs, which would be helpful for future experimental studies. The first two authors contributed equally to this work.
(The first two authors contributed equally to this work.)
[1] H. Weng, C. Fang, Z. Fang, B. A. Bernevig and X. Dai, Phys. Rev. X 5, 011029 (2015). [2] S.-M. Huang, S.-Y. Xu, I. Belopolski, C.-C. Lee, G. Chang, B. Wang, N. Alidoust, G. Bian, M. Neupane, C. Zhang, S. Jia, A. Bansil, H. Lin and M. Z. Hasan, Nat. Commun. 6, 7373 (2015)