Session J19: Frontiers in Electronic Structure Theory I
11:15 AM–2:15 PM, Tuesday, March 6, 2007
Colorado Convention Center Room: 104
Sponsoring Units:
DCP DCOMP
Chair: Martin Head-Gordon, University of California, Berkeley
Abstract ID: BAPS.2007.MAR.J19.6
Abstract: J19.00006 : Density Functional Theory in Transition Metal Chemistry: A Self-Consistent Hubbard U approach
1:03 PM–1:15 PM
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Abstract 
Authors:
Heather Kulik
(Massachusetts Institute of Technology)
Matteo Cococcioni
(University of Minnesota)
Nicola Marzari
(Massachusetts Institute of Technology)
Transition metals ions are reactive centers for a broad variety of biological and inorganic chemical reactions. Despite this central importance, density functional theory calculations based on local density or generalized gradient approximations (GGA) often fail qualitatively and quantitatively to describe multiplet splittings, relaxed structures, and reaction barriers for these systems. We have recently proposed$^{1}$ augmenting the GGA functional with a Hubbard U which is obtained from a self-consistent linear response procedure. This fully ab initio GGA+U approach provides excellent agreement with accurate, correlated-electron quantum chemistry calculations for paradigmatic cases that include the ground state of the iron dimer and addition-elimination reactions on bare FeO$^+$. We also show how a GGA+U approach may be applied to large-scale biological systems by preserving the favorable scaling of traditional density functional approaches with improved accuracy. 1) H. J. Kulik, M. Cococcioni, D. Scherlis and N. Marzari, PRL (2006).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.MAR.J19.6