Author(s): Andrea Urru, Ivo Souza, Óscar Pozo Ocaña, Stepan S. Tsirkin, and David Vanderbilt We present a numerical implementation, based on Wannier interpolation, of a Kubo-Greenwood formalism for computing the spatially dispersive optical conductivity in crystals at first order in the wave vector of light. This approach is more efficient than direct ab initio methods because, with less com… [Phys. Rev. B 112, 045201] Published Mon Jul 14, 2025