Fig. 4

Permittivity of a magnetic Weyl semimetal. a Band structure of a Weyl semimetal with a chiral shift \(2\varvec{b}\). b \(\varepsilon _a\) and the real part of \(\varepsilon _D\) in the permittivity tensor of Eq. (34). \(\varepsilon _0\) denotes the vacuum permittivity. c The real part of the Voigt permittivity \(\varepsilon _V\) in Eq. (38). The regions where \({\text {Re}}(\varepsilon _V)>0\) are shaded by color. Figures a, b are reproduced with permission from Ref. [14]. Copyright 2020 American Chemical Society