We published in Phys. Rev. X a combined experimental and theoretical study of MoTe2, which provides new evidence for the existence of type-II Weyl semimetals.
Using angle-resolved photoemission, we show that the inequivalent top and bottom (001) surfaces of MoTe2 host distinct Fermi arc surface states. Employing systematic electronic structure calculations, we show that some of these arcs likely arise from type-II Weyl points and are topologically nontrivial; other arcs are not related to the topological properties of the band structure.
Our work reveals that MoTe2 is a strong candidate for the realisation of a type-II Weyl semimetal phase. However, it also illustrates the numerous potential pitfalls to identifying type-II Weyl fermions, providing a framework for future spectroscopic studies of new topological materials