Density functional theory in transition-metal chemistry: A self-consistent Hubbard U approach

Transition-metal centers are the active sites for a broad variety of biological and inorganic chemical reactions. Notwithstanding this central importance, density-functional theory calculations based on generalized-gradient approximations often fail to describe energetics, multiplet structures, reaction barriers, and geometries around the active sites. We suggest here an alternative approach, derived from the Hubbard U correction to solid-state problems, that provides an excellent agreement with correlated-electron quantum chemistry calculations in test cases that range from the ground state of Fe-2 and Fe-2(-) to the addition elimination of molecular hydrogen on FeO+. The Hubbard U is determined with a novel self-consistent procedure based on a linear-response approach.


Published in:
Physical Review Letters, 97, 10, 103001
Year:
2006
ISSN:
0031-9007
Keywords:
Laboratories:




 Record created 2012-06-29, last modified 2018-01-28


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