Article (Scientific journals)
Impact of nuclear vibrations on van der Waals and Casimir interactions at zero and finite temperature
Venkataram, Prashanth; Hermann, Jan; Vongkovit, Teerit et al.
2019In Science Advances, 5 (1), p. 0456
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Abstract :
[en] Recent advances in measuring van der Waals (vdW) interactions have probed forces on molecules at nanometric separations from metal surfaces and demonstrated the importance of infrared nonlocal polarization response and temperature effects, yet predictive theories for these systems remain lacking. We present a theoretical framework for computing vdW interactions among molecular structures, accounting for geometry, short-range electronic delocalization, dissipation, and collective nuclear vibrations (phonons) at atomic scales, along with long-range electromagnetic interactions in arbitrary macroscopic environments. We primarily consider experimentally relevant low-dimensional carbon allotropes, including fullerenes, carbyne, and graphene, and find that phonons couple strongly with long-range electromagnetic fields depending on molecular dimensionality and dissipation, especially at nanometric scales, creating delocalized phonon polaritons that substantially modify infrared molecular response. These polaritons, in turn, alter vdW interaction energies between molecular and macroscopic structures, producing nonmonotonic power laws and nontrivial temperature variations at nanometric separations feasible in current experiments.
Disciplines :
Physics
Author, co-author :
Venkataram, Prashanth
Hermann, Jan
Vongkovit, Teerit
Tkatchenko, Alexandre ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Rodriguez, Alejandro W.
External co-authors :
yes
Language :
English
Title :
Impact of nuclear vibrations on van der Waals and Casimir interactions at zero and finite temperature
Publication date :
01 November 2019
Journal title :
Science Advances
ISSN :
2375-2548
Publisher :
American Association for the Advancement of Science (AAAS), Washington, United States - District of Columbia
Volume :
5
Issue :
1
Pages :
eaaw0456
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Computational Sciences
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