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**Harvard**

Thonhauser, T., Cooper, V., Li, S., Puzder, A., Hyldgaard, P. och Langreth, D. (2007) *Van der Waals density functional: Self-consistent potential and the nature of the van der Waals bond *.

** BibTeX **

@article{

Thonhauser2007,

author={Thonhauser, Timo and Cooper, Valentino and Li, Shen and Puzder, Aaron and Hyldgaard, Per and Langreth, David C.},

title={Van der Waals density functional: Self-consistent potential and the nature of the van der Waals bond },

journal={Physical Review B},

volume={76},

pages={125112},

abstract={We derive the exchange-correlation potential corresponding to the nonlocal van der Waals density functional [M. Dion, H. Rydberg, E. Schröder, D. C. Langreth, and B. I. Lundqvist, Phys. Rev. Lett. 92, 246401 (2004)]. We use this potential for a self-consistent calculation of the ground state properties of a number of van der Waals complexes as well as crystalline silicon. For the latter, where little or no van der Waals interaction is expected, we find that the results are mostly determined by semilocal exchange and correlation as in standard generalized gradient approximations (GGA), with the fully nonlocal term giving little effect. On the other hand, our results for the van der Waals complexes show that the self-consistency has little effect on the atomic interaction energy and structure at equilibrium distances. This finding validates previous calculations with the same functional that treated the fully nonlocal term as a post-GGA perturbation. A comparison of our results with wave-function calculations demonstrates the usefulness of our approach. The exchange-correlation potential also allows us to calculate Hellmann-Feynman forces, hence providing the means for efficient geometry relaxations as well as unleashing the potential use of other standard techniques that depend on the self-consistent charge distribution. The nature of the van der Waals bond is discussed in terms of the self-consistent bonding charge.},

year={2007},

keywords={van der Waals, Density-functional theory},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 61781

A1 Thonhauser, Timo

A1 Cooper, Valentino

A1 Li, Shen

A1 Puzder, Aaron

A1 Hyldgaard, Per

A1 Langreth, David C.

T1 Van der Waals density functional: Self-consistent potential and the nature of the van der Waals bond

YR 2007

JF Physical Review B

VO 76

AB We derive the exchange-correlation potential corresponding to the nonlocal van der Waals density functional [M. Dion, H. Rydberg, E. Schröder, D. C. Langreth, and B. I. Lundqvist, Phys. Rev. Lett. 92, 246401 (2004)]. We use this potential for a self-consistent calculation of the ground state properties of a number of van der Waals complexes as well as crystalline silicon. For the latter, where little or no van der Waals interaction is expected, we find that the results are mostly determined by semilocal exchange and correlation as in standard generalized gradient approximations (GGA), with the fully nonlocal term giving little effect. On the other hand, our results for the van der Waals complexes show that the self-consistency has little effect on the atomic interaction energy and structure at equilibrium distances. This finding validates previous calculations with the same functional that treated the fully nonlocal term as a post-GGA perturbation. A comparison of our results with wave-function calculations demonstrates the usefulness of our approach. The exchange-correlation potential also allows us to calculate Hellmann-Feynman forces, hence providing the means for efficient geometry relaxations as well as unleashing the potential use of other standard techniques that depend on the self-consistent charge distribution. The nature of the van der Waals bond is discussed in terms of the self-consistent bonding charge.

LA eng

LK http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000076000012125112000001&idtype=cvips&gifs=yes

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