An all-electron numerical method for solving the local density functional for polyatomic molecules

B. Delley

doi:10.1063/1.458452

journal article Jan 01, 1990

An all-electron numerical method for solving the local density functional for polyatomic molecules

B. Delley

The Journal of Chemical Physics Vol. 92 No. 1 pp. 508-517 · AIP Publishing

View at Publisher Save 10.1063/1.458452

Abstract

A method for accurate and efficient local density functional calculations (LDF) on molecules is described and presented with results. The method, Dmol for short, uses fast convergent three-dimensional numerical integrations to calculate the matrix elements occurring in the Ritz variation method. The flexibility of the integration technique opens the way to use the most efficient variational basis sets. A practical choice of numerical basis sets is shown with a built-in capability to reach the LDF dissociation limit exactly. Dmol includes also an efficient, exact approach for calculating the electrostatic potential. Results on small molecules illustrate present accuracy and error properties of the method. Computational effort for this method grows to leading order with the cube of the molecule size. Except for the solution of an algebraic eigenvalue problem the method can be refined to quadratic growth for large molecules.

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Details

Published: Jan 01, 1990
Vol/Issue: 92(1)
Pages: 508-517

Authors

B

B. Delley

Paul Scherrer Institut c/o Laboratories RCA, Badenerstrasse 569, CH-8048 Zürich, Switzerland

Cite This Article

B. Delley (1990). An all-electron numerical method for solving the local density functional for polyatomic molecules. The Journal of Chemical Physics, 92(1), 508-517. https://doi.org/10.1063/1.458452

An all-electron numerical method for solving the local density functional for polyatomic molecules

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