Surface Fermi arc connectivity in the type-II Weyl semimetal candidate WTe${}_2$

Abstract

We perform ultrahigh resolution angle-resolved photoemission experiments at a temperature T=0.8 K on the type-II Weyl semimetal candidate WTe${}_2$. We find a surface Fermi arc connecting the bulk electron and hole pockets on the (001) surface. Our results show that the surface Fermi arc connectivity to the bulk bands is strongly mediated by distinct surface resonances dispersing near the border of the surface-projected bulk band gap. By comparing the experimental results to first-principles calculations we argue that the coupling to these surface resonances, which are topologically trivial, is compatible with the classification of WTe${}_2$ as a type-II Weyl semimetal hosting topological Fermi arcs. We further support our conclusion by a systematic characterization of the bulk and surface character of the different bands and discuss the similarity of our findings to the case of topological insulators.

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Cited by in corpus (20)

• Spectroscopic Evidence of Type II Weyl Semimetal State in WTe2
• Mode-resolved reciprocal space mapping of electron-phonon interaction in the Weyl semimetal candidate Td-WTe${}_2$
• Elastic, electronic, bonding, and optical properties of WTe2 Weyl semimetal: A comparative investigation with MoTe2 from first principles
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• Observation of Weyl nodes in robust type-II Weyl semimetal WP2
• Electronic properties of type-II Weyl semimetal WTe${}_2$. A review perspective
• Coexistence of New Fermions in Topological Semimetal TaS
• Thickness dependent electronic structure in WTe${}_2$ thin films
• Spin-resolved electronic response to the phase transition in MoTe${}_2$
• Engineering Dirac states in graphene: Coexisting type-I and type-II Floquet-Dirac fermions
• Universal response of the type-II Weyl semimetals phase diagram
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• On the possibility of magnetic Weyl fermions in non-symmorphic compound PtFeSb
• A combined laser-based ARPES and 2PPES study of Td-WTe${}_2$
• Electronic band structure from quasiparticle interference and Landau quantization in WTe${}_2$
• Mechanically tunable spontaneous vertical charge redistribution in few-layer WTe2