Reference : Long-Range Repulsion Between Spatially Confined van der Waals Dimers
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
Computational Sciences; Physics and Materials Science
http://hdl.handle.net/10993/31266
Long-Range Repulsion Between Spatially Confined van der Waals Dimers
English
Sadhukhan, Mainak mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Tkatchenko, Alexandre mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
2017
Physical Review Letters
American Physical Society
118
210402
Yes (verified by ORBilu)
International
0031-9007
1079-7114
Ridge
NY
[en] It is an undisputed textbook fact that nonretarded van der Waals (vdW) interactions between isotropic
dimers are attractive, regardless of the polarizability of the interacting systems or spatial dimensionality. The universality of vdW attraction is attributed to the dipolar coupling between fluctuating electron charge densities. Here, we demonstrate that the long-range interaction between spatially confined vdW dimers becomes repulsive when accounting for the full Coulomb interaction between charge fluctuations. Our analytic results are obtained by using the Coulomb potential as a perturbation over dipole-correlated states for two quantum harmonic oscillators embedded in spaces with reduced dimensionality; however, the long-range repulsion is expected to be a general phenomenon for spatially confined quantum systems. We suggest optical experiments to test our predictions, analyze their relevance in the context of intermolecular interactions in nanoscale environments, and rationalize the recent observation of anomalously strong screening of the lateral vdW interactions between aromatic hydrocarbons adsorbed on metal surfaces.
http://hdl.handle.net/10993/31266

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