Volume 50, Number 4, May II 2000
|Page(s)||447 - 453|
|Section||Atomic and molecular physics|
|Published online||01 September 2002|
Non-conventional screening of the Coulomb interaction in low-dimensional and finite-size systems
Department of Applied Physics,
University of Twente
P.O. Box 217,
7500 AE Enschede,
2 Laboratory of Applied and Solid State Physics, Materials Science Center, University of Groningen - Nijenborgh 4, 9747 AG Groningen, The Netherlands
Accepted: 20 March 2000
We study the screening of the Coulomb interaction in non-polar systems by polarizable atoms. We show that in low dimensions and small finite-size systems this screening deviates strongly from that conventionally assumed. In fact in one dimension the short-range interaction is strongly screened and the long-range interaction is anti-screened thereby strongly reducing the gradient of the Coulomb interaction and therefore the correlation effects. We argue that this effect explains the success of mean-field single-particle theories for large molecules.
PACS: 31.25.Qm – Electron-correlation calculations for polyatomic molecules / 71.20.Tx – Fullerenes and related materials; intercalation compounds / 71.27.+a – Strongly correlated electron systems; heavy fermions
© EDP Sciences, 2000
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