Dear Wien2k users!

I am happy to announce the release of *woptic* <>,
a package to calculate the optical conductivity, dc conductivity, and
thermopower in the Wien2k ecosystem.

Woptic builds upon the optic and wien2wannier modules of Wien2k,
combined with Wannier90 and (optionally) an external many-body
calculation, to work with the dipole matrix elements from optic in a
basis of maximally-localized Wannier functions.

Interesting features include:

 * woptic can incorporate a local self-energy Σ(ω) from a many-body
   calculation such as dynamical mean-field theory (DMFT)

 * it employs an adaptive k-integration scheme to sample the Brillouin
   zone efficiently

 * it uses the full dipole matrix elements, rotated to the Wannier

 * transitions beyond the Wannier orbitals can be included in an
   “outer window”.

For more information, and to download the code, visit

Since the code is still new, feedback is especially welcome, either
through the GitHub page <>, or by

For the theory behind woptic and a description of the algorithm see
the preprint

  woptic: optical conductivity with Wannier functions
  and adaptive k-mesh refinement

  E. Assmann, P. Wissgott, J. Kuneš, A. Toschi, P. Blaha, K. Held

Note: Long-time users of wien2wannier may know woptic as a part of
early releases of that package.  Since then, it has been much expanded
and updated to work with the current version of wien2wannier.

            Elias Assmann
        for the woptic authors

Elias Assmann
Institute of Theoretical and Computational Physics
TU Graz                   ⟨⟩

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