Experimental discovery of a topological Weyl semimetal state in TaP

ORAL

Abstract

We observed Weyl fermion cones and nodes in the bulk and the Fermi arcs on the surface of Weyl semimetal TaP. Also, we found that the surface states show an unexpectedly rich structure, including both topological Fermi arcs and topologically trivial closed contours in the vicinity of the Weyl points. A rigorous scheme for directly demonstrating the bulk-boundary correspondence and, hence, establishing the Weyl semimetal state in TaP is discussed.

*The work at Princeton and Princeton-led ARPES measurements were supported by the Gordon and Betty Moore Foundations EPiQS Initiative through grant GBMF4547 (Hasan) and by U.S. Department of Energy DE-FG-02-05ER46200

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Authors

  • Su-Yang Xu

    • Princeton University
    • Princeton Univ

  • Ilya Belopolski

    • Princeton Univ

  • Daniel Sanchez

    • Princeton Univ

  • Cheng Guo

    • Peking University

  • Guoqing Chang

    • National University of Singapore

  • Chenglong Zhang

    • Peking University

  • Guang Bian

    • Princeton Univ

  • Zhujun Yuan

    • Peking University

  • Hong Lu

    • Peking University

  • Yiyang Feng

    • Peking University

  • Tay-Rong Chang

    • National Tsing Hua University

  • Pavel Shibayev

    • Princeton Univ

  • Mykhailo Prokopovych

    • Paul Scherrer Institute

  • Nasser Alidoust

    • Princeton Univ

  • Hao Zheng

    • Princeton Univ

  • Chi-Cheng Lee

    • National University of Singapore

  • Shin-Ming Huang

    • National University of Singapore

  • Raman Sankar

    • National Taiwan University

  • Horn-Tay Jenny

    • National Tsing Hua University

  • Arun Bansil

    • Northeastern University

  • Titus Neupert

    • Princeton Univ

  • Vladimir Strocov

    • Paul Scherrer Institute

  • Hsin Lin

    • National University of Singapore

  • Shuang Jia

    • Peking University

  • M. Zahid Hasan

    • Princeton Univ