Finite-size correction in many-body electronic structure calculations

Abstract

Finite-size (FS) effects are a major source of error in many-body (MB) electronic structure calculations of extended systems. A method is presented to correct for such errors. We show that MB FS effects can be effectively included in a modified local density approximation calculation. A parametrization for the FS exchange-correlation functional is obtained. The method is simple and gives post-processing corrections that can be applied to any MB results. Applications to a model insulator (P${}_2$ in a supercell), to semiconducting Si, and to metallic Na show that the method delivers greatly improved FS corrections.

5 pages, 4 figures

References in corpus (1)

• Phaseless auxiliary-field quantum Monte Carlo calculations with planewaves and pseudopotentials--applications to atoms and molecules

Cited by in corpus (1)

• Spatially inhomogeneous phase in the two-dimensional repulsive Hubbard model