Reconstruction of surface electron spectrum and cyclotron motion in the CDW phase of Weyl semimetals

We study reconstruction of the surface electron spectrum in the excitonic transition in Weyl semimetals, which is accompanied by a formation of charge density wave. In this case, the excitonic phase is a topological insulator. The surface states spectrum is formed by reconnection of the Fermi arcs of the parent Weyl semimetal. It consists of either closed Fermi loops or open Frieze patterns traversing the reconstructed surface mini-Brillouin zone. We study the consequences of the spectral reconstruction for the surface cyclotron motion.