Optimized norm-conserving Vanderbilt pseudopotentials
Abstract
Fully-nonlocal two-projector norm-conserving pseudopotentials are shown to be compatible with a systematic approach to the optimization of convergence with the size of the plane-wave basis. A new formulation of the optimization is developed, including the ability to apply it to positive-energy atomic scattering states, and to enforce greater continuity in the pseudopotential. The generalization of norm-conservation to multiple projectors is reviewed and recast for the present purposes. Comparisons among the results of all-electron and one- and two-projector norm-conserving pseudopotential calculations of lattice constants and bulk moduli are made for a group of solids chosen to represent a variety of types of bonding and a sampling of the periodic table.
Cite
@article{arxiv.1306.4707,
title = {Optimized norm-conserving Vanderbilt pseudopotentials},
author = {D. R. Hamann},
journal= {arXiv preprint arXiv:1306.4707},
year = {2015}
}