The electrons in Weyl semimetals (WSM) collectively behave as Weyl fermions. Weyl fermions have a linear dispersion (like relativistic massless particles) and a well-defined chirality. WSM are gapless metals with a series of closing band gap points; those points are called Weyl nodes. At the Weyl nodes, the linear dispersion can present a tilt; consequently, WSM are classified as type I if there is no a tilt, and type II if there is a tilt. Additionally, at the boundary of WSM can emerge topologically protected surface states known as Fermi arcs. The Fermi arcs have robust electron transport and, in this work, we present the robustness of those states to deformations. Adding a mechanical deformation to WSM changes the electronic structure in such a way that the electrons behave as if they were subjected to an electromagnetic field. The effective electromagnetic field due to the mechanical deformation is known as pseudofield. In this work, we explore the change of the electronic structure due to a harmonic deformation as a simple model for a vibrational mode.

Pseudofields in Type I and Type II Weyl Semimetals: A Theoretical Characterization of Fermi Arcs

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