WEST Data Collections / GW100 / Difluoride (F2)


System details
Compound Difluoride
Formula F2
CAS Number 7782-41-4



Ground state input
Pseudopotential(s) SG15[01] ()

Dielectric Screening
Spectral Function
Vertical Ionization Potential
Vertical Electron Affinity



Dielectric Screening

The dielectric matrix of Difluoride (F2) is computed in WEST by iterative diagonalization, see Fig. 2 of Ref. [02]. The eigenvalues of the symmetrized irreducible polarizability for Difluoride (F2) are reported in Fig. 1. Results were obtained using the program wstat.x of the WEST package.

Fig. 1 - Eigenvalues of the symmetrized irreducible polarizability for Difluoride (F2). The calculations were performed with the PBE exchange-correlation functional.




Spectral Function

The G0W0 spectral function of Difluoride (F2) is computed in WEST with full frequency integration. Results were obtained using the program wfreq.x of the WEST package.

Fig. 2 - G0W0 HOMO spectral function of Difluoride (F2). The calculations were performed with the PBE exchange-correlation functional.




Vertical Ionization Potential (VIP)



Vertical Electron Affinity (VEA)



Legend

  • AE: All Electron
  • AC: Analytic Continuation
  • EXP: Experimental value, if marked in parentheses the ionization potential is not vertical
  • FA: Fully Analytic
  • FF-CD: Full Frequency integration w/ Contour Deformation
  • FF-RA: Full Frequency integration along the Real Axis
  • Full: Full solution of the quasiparticle (QP) eq.
  • Linear: Solution of the linearized quasiparticle (QP) eq.
  • LO: Localized Orbitals
  • PSP: Pseudopotential
  • PW: Plane Waves
  • XC: Exchange and Correlation


References

  • [01] M. Schlipf, and F. Gygi, Optimization algorithm for the generation of ONCV pseudopotentials, Comput. Phys. Comm. 196, 36 (2015).
  • [02] M. Govoni, and G. Galli, Large Scale GW calculations, J. Chem. Theory Comput. 11, 2680 (2015).
  • [03] M.J. van Setten, F. Caruso, S. Sharifzadeh, X. Ren, M. Scheffler, F. Liu, J. Lischner, L. Lin, J.R. Deslippe, S.G. Louie, C. Yang, F. Weigend, J.B. Neaton, F. Evers, and P. Rinke, GW100: Benchmarking G0W0 for Molecular Systems, J. Chem. Theory Comput. 11, 5665 (2015).
  • [04] E. Maggio, P. Liu, M. J. van Setten, and G. Kresse, GW100: A Plane Wave Perspective for Small Molecules, J. Chem. Theory Comput. 13, 635 (2017).
  • [05] M. Govoni, and G. Galli, GW100: Comparison of Methods and Accuracy of Results Obtained with the WEST Code, J. Chem. Theory Comput. 18, 1895 (2018).