Abstract
For a Coulomb system contained in a domain Λ, the dielectric susceptibility tensor χ Λ is defined as relating the average polarization in the system to a constant applied electric field, in the linear limit. According to the phenomenological laws of macroscopic electrostatics, χ Λ depends on the specific shape of the domain Λ. In this paper we derive, using the methods of equilibrium statistical mechanics in both canonical and grand-canonical ensembles, the shape dependence of χ Λ and the corresponding finite-size corrections to the thermodynamic limit, for a class of general ν-dimensional (ν≥2) Coulomb systems, of ellipsoidal shape, being in the conducting state. The microscopic derivation is based on a general principle: the total force acting on a system in thermal equilibrium is zero. The results are checked in the Debye–Hückel limit. The paper is a generalization of a previous one [L. Šamaj, J. Stat. Phys. 100:949 (2000)], dealing with the special case of a one-component plasma in two dimensions. In that case, the validity of the presented formalism has already been verified at the exactly solvable (dimensionless) coupling Γ=2.
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(Unité Mixte de Recherche no. 8627 - CNRS)
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Jancovici, B., Šamaj, L. Microscopic Calculation of the Dielectric Susceptibility Tensor for Coulomb Fluids II. Journal of Statistical Physics 114, 1211–1234 (2004). https://doi.org/10.1023/B:JOSS.0000013972.61656.65
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DOI: https://doi.org/10.1023/B:JOSS.0000013972.61656.65