Improvement on the GW$Γ$ Scheme for the Electron Self-Energy and Relevance of the $G_0W_0$ Approximation from this Perspective

Details Improvement on the GW$Γ$ Scheme for the Electron Self-Energy and Relevance of the $G_0W_0$ Approximation from this Perspective Improvement on the GW$Γ$ Scheme for the Electron Self-Energy and Relevance of the $G_0W_0$ Approximation from this Perspective

2010-03-17

arxiv.org/abs/1003.3342v2

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

Based on an exact functional form derived for the three-point vertex function $\Gamma$, we propose a self-consistent calculation scheme for the electron self-energy with $\Gamma$ always satisfying the Ward identity. This scheme is basically equivalent to the one proposed in 2001, but it is improved in the aspects of computational costs and its applicability range; it can treat a low-density electron system with a dielectric catastrophe. If it is applied to semiconductors and insulators, we find that the obtained quasiparticle dispersion is virtually the same as that in the one-shot $GW$ approximation (or $G_0W_0$A), indicating that the $G_0W_0$A actually takes proper account of both vertex and high-order self-energy corrections in a mutually cancelling manner.

Affiliated with

Also associated with

No associations

Rating

Improvement on the GW$Γ$ Scheme for the Electron Self-Energy and Relevance of the $G_0W_0$ Approximation from this Perspective does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Improvement on the GW$Γ$ Scheme for the Electron Self-Energy and Relevance of the $G_0W_0$ Approximation from this Perspective, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improvement on the GW$Γ$ Scheme for the Electron Self-Energy and Relevance of the $G_0W_0$ Approximation from this Perspective will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-233709