Effects of gradient corrections on electronic structure in metals
- 17 September 1990
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 2 (37), 7597-7611
- https://doi.org/10.1088/0953-8984/2/37/005
Abstract
Gradient corrections to the local density (LD) potential proposed by Perdew and Wang (PW) and to some extent by Langreth, Mehl and Hu (LMH) have been used in self-consistent LMTO band calculatiom in order to detellnine groundstate and bands properties in some 3d, 4d and 5d transition metals, in the alkali metal Li and in Ce. The effect compared with LD is to expand and soften the lattice, which in general is too drastic for an improvement especially for 4d and 5d metals. Magnetic properties in Fe and Ni do not improve while the effect on some general band properties are only slightly better than in LD calculations. Despite some cases of improvement we conclude that the overall results obtained via gradient-corrected potentials are not yet sufficiently good to replace the LD potential.This publication has 60 references indexed in Scilit:
- Energies of atoms with nonspherical charge densities calculated with nonlocal density-functional theoryPhysical Review Letters, 1987
- Erratum: Density-functional approximation for the correlation energy of the inhomogeneous electron gasPhysical Review B, 1986
- Density-functional approximation for the correlation energy of the inhomogeneous electron gasPhysical Review B, 1986
- Accurate and simple density functional for the electronic exchange energy: Generalized gradient approximationPhysical Review B, 1986
- Density functional calculations of molecular bond energiesThe Journal of Chemical Physics, 1986
- Accurate Density Functional for the Energy: Real-Space Cutoff of the Gradient Expansion for the Exchange HolePhysical Review Letters, 1985
- A Spin Dependent Version of the Langreth-Mehl Exchange-Correlation FunctionalPhysica Scripta, 1985
- Effect of Langreth-Mehl gradient correction on transition-metal band structures: Copper and vanadiumPhysical Review B, 1983
- Beyond the local-density approximation in calculations of ground-state electronic propertiesPhysical Review B, 1983
- Improved Statistical Exchange Approximation for Inhomogeneous Many-Electron SystemsPhysical Review Letters, 1969