## Fermi arc electronic structure and Chern numbers in the type-II Weyl semimetal candidate ${\mathrm{Mo}}_{x}{\mathrm{W}}_{1-x}{\mathrm{Te}}_{2}$

It has recently been proposed that electronic band structures in crystals can give rise to a previously overlooked type of Weyl fermion, which violates Lorentz invariance and, consequently, is forbidden in particle physics. It was further predicted that Mo

_{x}W_{1 - x}Te_{2}may realize such a type-II Weyl fermion. Here, we first show theoretically that it is crucial to access the band structure above the Fermi level ε F to show a Weyl semimetal in Mo_{x}W_{1 - x}Te_{2}. Then, we study Mo x W_{1 - x}Te_{2}bymore »