Finite electric-field approach to evaluate the vertex correction for the screened Coulomb interaction in the quasiparticle self-consistent GW method
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DOI: 10.1103/physrevb.101.205120
Abstract: We apply the quasiparticle self-consistent GW method (QSGW) to slab models of ionic materials, LiF, KF, NaCl, MgO, and CaO, under electric field. Then we obtain the optical dielectric constants E(Slab) from the differences of… read more here.
Keywords: vertex correction; consistent method; electric field; quasiparticle self ... See more keywords
Simple vertex correction improves GW band energies of bulk and two-dimensional crystals
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DOI: 10.1103/physrevb.96.205206
Abstract: The GW self-energy method has long been recognized as the gold standard for quasiparticle (QP) calculations of solids in spite of the fact that the neglect of vertex corrections and the use of a DFT… read more here.
Keywords: correction improves; band gap; simple vertex; vertex correction ... See more keywords