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- W335603986 abstract "van der Waals interactions are important in typical van der Waals-bound systems such as noble gas, hydrocarbon, and alkaline earth dimers. The summed-up van der Waals series of Perdew et al. 2012 works well and is asymptotically correct at large separation between two atoms. However, as with the Hamaker 1937 expression, it has a strong singularity at short non-zero separation, where the two atoms touch. In this work we remove that singularity (and most of the short-range contribution) by evaluating the summed-up series at an effective distance between the atom centers. Only one fitting parameter is introduced for this short-range cut-off. The parameter in our model is optimized for each system, and a system-averaged value is used to make the final binding energy curves. This method is applied to different noble gas dimers such as Ar–Ar, Kr–Kr, Ar–Kr, Ar–Xe, Kr–Xe, Xe–Xe, Ne–Ne, He–He, and also to the Be2 dimer. When this correction is added to the binding energy curve from the semilocal density functional meta-GGA-MS2, we get a vdW-corrected binding energy curve. These curves are compared with the results of other vdW-corrected methods such as PBE-D2 and vdW-DF2, and found to be typically better. Binding energy curves are in reasonable agreement with those from experiment." @default.
- W335603986 created "2016-06-24" @default.
- W335603986 creator A5014987686 @default.
- W335603986 creator A5054389942 @default.
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- W335603986 date "2015-01-01" @default.
- W335603986 modified "2023-09-23" @default.
- W335603986 title "Short-Range Cut-Off of the Summed-Up van der Waals Series: Rare-Gas Dimers" @default.
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- W335603986 doi "https://doi.org/10.1007/128_2015_625" @default.
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