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research article
Linear-scaling DFT+U with full local orbital optimization
2012
We present an approach to the DFT+U method (density functional theory + Hubbard model) within which the computational effort for calculation of ground-state energies and forces scales linearly with system size. We employ a formulation of the Hubbard model using nonorthogonal projector functions to define the localized subspaces, and we apply it to a local orbital DFT method including in situ orbital optimization. The resulting approach thus combines linear-scaling and systematic variational convergence. We demonstrate the scaling of the method by applying it to nickel-oxide nanoclusters with sizes exceeding 7000 atoms.
Type
research article
Web of Science ID
WOS:000300239600004
Authors
Publication date
2012
Published in
Volume
85
Article Number
085107
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
March 15, 2012
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