Article (Scientific journals)
Long-Range Repulsion Between Spatially Confined van der Waals Dimers
Sadhukhan, Mainak; Tkatchenko, Alexandre
2017In Physical Review Letters, 118, p. 210402
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Abstract :
[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.
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Physics
Author, co-author :
Sadhukhan, Mainak ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Tkatchenko, Alexandre ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
External co-authors :
no
Language :
English
Title :
Long-Range Repulsion Between Spatially Confined van der Waals Dimers
Publication date :
2017
Journal title :
Physical Review Letters
ISSN :
1079-7114
Publisher :
American Physical Society, Ridge, United States - New York
Volume :
118
Pages :
210402
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Computational Sciences
Physics and Materials Science
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since 26 May 2017

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