Dear Psi-K community,

We are happy to announce the Wannier Berri code - a new tool for Wannier interpolation and integration in k-space. Now the code is described in detail on its own  web page:

http://wannier-berri.org

Being in spirit close to postw90.x part of Wannier90, it has a number of methodological improvements.   Those include:

• speed - it may be up to 1000 or more times faster then postw90.x

   : comparison. This is achieved due to 

  • use of a Fast Fourier transform
  • use of symmetries to reduce evaluation to symmetry-irreducible k points and make the result symmetric.
  • optimization of Fermi scan and minimal distance replica selection , which now have no computational cost
• extensive functionality 
  • Anomalous Hall conductivity
  • Orbital magnetisation
  • Berry curvature dipole (Fermi-sea and Fermi-surface formulas)
  • Gyrotropic magnetoelectric tensor (Fermi-sea and Fermi-surface formulas)
  • Hall coefficient
  • Kubo-Greenwood formula for optical conductivity
  • more..
• flexibility – may be used with Wannier functions and tight-binding models
• Recursive adaptive refinement for enhanced accuracy in resolving "hot spots" in k-space.