淡江大學機構典藏:Item 987654321/117199
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    題名: Discovery of a Weyl Fermion semimetal and topological Fermi arcs
    作者: Xu, Su-Yang;Belopolski, Ilya;Alidoust, Nasser;Neupane, Madhab;Bian, Guang;Zhang, Chenglong;Sankar, Raman;Chang, Guoqing;Yuan, Zhujun;Lee, Chi-Cheng;Huang, Shin-Ming;Zheng, Hao;Ma, Jie;Sanchez, Daniel S.;Wang, BaoKai;Bansil, Arun;Chou, Fangcheng;Shibayev, Pavel P.;Lin, Hsin;Jia, Shuang;Hasan, M. Zahid
    日期: 2015-08-07
    上傳時間: 2019-10-03 12:10:55 (UTC+8)
    摘要: A Weyl semimetal is a new state of matter that hosts Weyl fermions as emergent quasiparticles and admits a topological classification that protects Fermi arc surface states on the boundary of a bulk sample. This unusual electronic structure has deep analogies with particle physics and leads to unique topological properties. We report the experimental discovery of a Weyl semimetal, tantalum arsenide (TaAs). Using photoemission spectroscopy, we directly observe Fermi arcs on the surface, as well as the Weyl fermion cones and Weyl nodes in the bulk of TaAs single crystals. We find that Fermi arcs terminate on the Weyl fermion nodes, consistent with their topological character. Our work opens the field for the experimental study of Weyl fermions in physics and materials science.
    關聯: Science 349(6248), p.613-617
    DOI: 10.1126/science.aaa9297
    顯示於類別:[物理學系暨研究所] 期刊論文

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