Observation of Fermi Arcs in Type-II Weyl Semimetal Candidate WTe2

Yun Wu; Na Hyun Jo; Daixiang Mou; Lunan Huang; S. L. Bud'ko; P. C. Canfield; Adam Kaminski

doi:10.1103/PhysRevB.94.121113

Observation of Fermi Arcs in Type-II Weyl Semimetal Candidate WTe2

Materials Science 2017-03-21 v1

Authors: Yun Wu , Na Hyun Jo , Daixiang Mou , Lunan Huang , S. L. Bud'ko , P. C. Canfield , Adam Kaminski

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Abstract

We use ultrahigh resolution, tunable, vacuum ultraviolet laser angle-resolved photoemission spectroscopy (ARPES) to study the electronic properties of WTe $_2$ , a material that was predicted to be a type-II Weyl semimetal. The Weyl fermion states in WTe2 were proposed to emerge at the crossing points of electron and hole pockets; and Fermi arcs connecting electron and hole pockets would be visible in the spectral function on (001) surface. Here we report the observation of such Fermi arcs in WTe2 confirming the theoretical predictions. This provides strong evidence for type-II Weyl semimetallic states in WTe2.

Keywords

WTe2 type-II Weyl semimetal Fermi arcs angle-resolved photoemission spectroscopy Weyl fermion states

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@article{arxiv.1604.05176,
  title  = {Observation of Fermi Arcs in Type-II Weyl Semimetal Candidate WTe2},
  author = {Yun Wu and Na Hyun Jo and Daixiang Mou and Lunan Huang and S. L. Bud'ko and P. C. Canfield and Adam Kaminski},
  journal= {arXiv preprint arXiv:1604.05176},
  year   = {2017}
}

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5 pages, 4 figures

Observation of Fermi Arcs in Type-II Weyl Semimetal Candidate WTe2

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