Yambo Post Processing (ypp)

YPP is a post-processing tool included in the Yambo distribution.
In this tutorial we present a non-exhaustive list of the things that can be calculated with this tool.

• Brillouin Zone:
  

-k p → write the k-point list in different format
-k q →    write the q-point list in different format
-k s →    generate shifted k-points grid
-k h →    write the highest symmetry points in the BZ
-k r →    generate random k-points in the BZ
-k e →    generate regular k-points grids 
-map →    map a fine grid of k-points on the coarse one, see Double-grid in Yambo

• Convertions:

-y  →     Remove symmetries not consistent with an external perturbation, see Real Time propagation with Yambo and Linear response in real-time
-qpdb g →  generate-modify quasi-particle(QP) database
-qpdb m →  merge quasi-particle(QP) databases
-qpdb e →  expand quasi-particle(QP) database in the full Brillouin zone(BZ)

• Plots:

-b → Select the momentum of the exciton you want to analize (default = 1)
-s w  → Plot electron wave-functions
-s d  → Plot electron density
-s m  → Plot electron magnetization
-s b  → Interpolate electronic bands using the approach of Ref., adding  -V qp includes the quasi-particle correction
 -s c  → Plot the current density

)

 -e s  → Sort exciton according to their energy and dipole, see How to analyze excitons
 -e sp → ExSort exciton according to their energy and dipole
-dipoles              <string>   :Dipole properties (more with -h dipoles)
-freehole                        :Free hole position in the excitonic plot
-avehole                         :Average hole/electron wavefunction

• SOC:

-soc             (-w)            :Perturbative SOC mapping