Surface states and arcless angles in twisted Weyl semimetals

Abstract

This article demonstrates the profound reconstruction of Fermi arcs at an interface between surfaces of two Weyl semimetals, which exhibits a strong dependence on the relative twist angle between them. Most prominently, as this passes through special ``arcless angles'', Fermi loops of states with no connection to the bulk appear in the moir\'e Brillouin zone. Such states have interesting resonance signatures in the optical conductivity of the system in a magnetic field perpendicular to the interface.

Topics & Concepts