  Weyl semimetals (WSMs) have recently attracted a great deal of attention as
they provide condensed matter realization of chiral anomaly, feature
topologically protected Fermi arc surface states and sustain sharp chiral Weyl
quasiparticles up to a critical disorder at which a continuous quantum phase
transition (QPT) drives the system into a metallic phase. We here numerically
demonstrate that with increasing strength of disorder the Fermi arc gradually
looses its sharpness, and close to the WSM-metal QPT it completely dissolves
into the metallic bath of the bulk. Predicted topological nature of the
WSM-metal QPT and the resulting bulk-boundary correspondence across this
transition can directly be observed in
angle-resolved-photo-emmision-spectroscopy (ARPES) and Fourier transformed
scanning-tunneling-microscopy (STM) measurements by following the continuous
deformation of the Fermi arcs with increasing disorder in recently discovered
Weyl materials.
