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Strong screening in the plum pudding model

By A. D. Chepelianskii, F. Closa, E. Raphael and E. Trizac

Abstract

We study a generalized Thomson problem that appears in several condensed matter settings: identical point-charge particles can penetrate inside a homogeneously charged sphere, with global electro-neutrality. The emphasis is on scaling laws at large Coulombic couplings, and deviations from mean-field behaviour, by a combination of Monte Carlo simulations and an analytical treatment within a quasi-localized charge approximation, which provides reliable predictions. We also uncover a local overcharging phenomenon driven by ionic correlations alone

Topics: Condensed Matter - Soft Condensed Matter, Condensed Matter - Statistical Mechanics
Year: 2011
DOI identifier: 10.1209/0295-5075/94/68010
OAI identifier: oai:arXiv.org:1104.3263
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