期刊
JOURNAL OF COMPUTATIONAL CHEMISTRY
卷 34, 期 5, 页码 405-417出版社
WILEY
DOI: 10.1002/jcc.23088
关键词
Hirshfeld; solids; pseudopotentials; atoms in molecules; ceria; diamond; graphite; graphene
资金
- FWO-Vlaanderen [3G080209]
- Ghent University
- Hercules Foundation
- Flemish Government-Department EWI
In this work, a method is described to extend the iterative Hirshfeld-I method, generally used for molecules, to periodic systems. The implementation makes use of precalculated pseudopotential-based electron density distributions, and it is shown that high-quality results are obtained for both molecules and solids, such as ceria, diamond, and graphite. The use of grids containing (precalculated) electron densities makes the implementation independent of the solid state or quantum chemical code used for studying the system. The extension described here allows for easy calculation of atomic charges and charge transfer in periodic and bulk systems. The conceptual issue of obtaining reference densities for anions is discussed, and the delocalization problem for anionic reference densities originating from the use of a plane wave basis set is identified and handled. (C) 2012 Wiley Periodicals, Inc.
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