Observation of large topologically trivial Fermi arcs in the candidate type-II Weyl semimetal WT e 2
By F. Bruno, A. Tamai, Quansheng Wu, I. Cucchi, C. Barreteau, A. D. L. Torre, S. Walker, S. Riccó, Zhiming Wang, Timur K. Kim and 6 more. 2016
146 citations recorded by the source corpus.
The authors present here several advances towards a comprehensive understanding of WTe${}_{2}$. Using microfocus laser ARPES, they resolve for the first time the distinct electronic structure of both inequivalent top and bottom (001) surfaces of WTe${}_{2}$. Moreover, they demonstrate for the first time the presence of large surface state Fermi arcs on both surfaces. Using surface electronic structure calculations, they further demonstrate that these Fermi arcs are topologically trivial and that their existence is independent of the presence of type-II Weyl points in the bulk band structure. Contrary to common belief, the observation of surface state Fermi arcs is thus not suitable to robustly identify a type-II Weyl semimetal. Finally, the authors use the observation of Fermi arcs and distinct top and bottom surfaces to clarify the controversial bulk electronic structure of WTe${}_{2}$. They show that the bulk Fermi surface is formed by three-dimensional electron and hole pockets with areas that are found to be in good agreement with transport experiments, with the exception of small hole pockets that have not been observed in quantum oscillation experiments.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/0763840e8db8303199f3936200e549713d5d89ae
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In Atomic and Molecular Physics, and Optics
In Materials Chemistry
- Ashvin Vishwanath
- N. P. Armitage
- E. Mele
- Xiao-Liang Qi
- Masatoshi Sato
- J. Moore
- Bogdan Andrei Bernevig
- Y. Ando
Citations in the corpus
- Weyl and Dirac semimetals in three-dimensional solids (2017, background): “…2016b; Tamai et al., 2016), WTe2 (Wang et al., 2016c), their alloy MoxW1−xTe2 (Belopolski et al., 2016a,b) and TaIrTe4 (Belopolski et al., 2016d; Haubold et al., 2017; Koepernik et al., 2016), although the evidence in the case of WTe2 is controversial as discussed below and in (Bruno et al., 2016).”