Abstract
We propose the use of an approximate bootstrap exchange-correlation kernel to account for vertex corrections in self-consistent calculations. We show that the approximate kernel gives accurate band gaps for a variety of extended systems, including simple semiconductors, wide band-gap insulators, and transition-metal compounds with either closed or open shells. The accuracy is comparable with that obtained via the solution of the Bethe-Salpeter equation but only at a fraction of the computational cost.
- Received 7 May 2015
DOI:https://doi.org/10.1103/PhysRevB.92.041115
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