Sign Change of Faraday Rotation in Uniaxially Strained Weyl Semi-metals

Abstract

Faraday rotation of Weyl fermions under uniaxial strain has been investigated in which the tight-binding Hamiltonian and Kubo approach have been employed. The influence of the strain has been considered as a change of hopping parameter. Results show that the Faraday rotation angle can be controlled by the external strain. Meanwhile, results show that the sign of the Faraday rotation can be reversed at some ranges of strain and incident light frequency.