Observation of Fermi arcs in the type-II Weyl semimetal candidate WTe 2

By Yun Wu, D. Mou, N. Jo, Kewei Sun, Lunan Huang, S. Bud’ko, Paul C. Canfield, A. Kaminski. 2016

231 citations recorded by the source corpus.

In recently predicted type-II Weyl semimetals, the Weyl states connect hole and electron bands that would otherwise be separated by an indirect gap. The set of points in the momentum space at which both bands touch are called Weyl points and are connected by Fermi arcs at the surface of the sample. Experimental evidence confirmed existence of these exotic fermions in MoTe${}_{2}$ and Mo${}_{x}$W${}_{1-x}$Te${}_{2}$. Here, the authors show that such states also exist in pure WTe${}_{2}$ and are very sensitive to strain. While flat undistorted portions of the sample show well defined Fermi arcs -- a clear signature of Weyl fermions -- strain due to bulking of the surface in other locations suppresses this state and destroys the Weyl state. Such high sensitivity to strain provides a simple way to tune properties of Weyl Fermions and explore the physics of these unusual objects.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/396b7d0d54a7be23e9015a0bb8845423397ece5e

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In Atomic and Molecular Physics, and Optics

1. Quansheng Wu
2. Alexey A. Soluyanov

In Materials Chemistry

1. Quansheng Wu
2. Alexey A. Soluyanov

Citations in the corpus

• Fermi Arcs and Their Topological Character in the Candidate Type-II Weyl Semimetal MoTe 2 (2016, background): “[33] Yun Wu, Na Hyun Jo, Daixiang Mou, Lunan Huang, S.”