Coulomb Systems with Ideal Dielectric Boundaries: Free Fermion Point and Universality

B. Jancovici; L. Šamaj

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arXiv · cond-mat/0101046

Coulomb Systems with Ideal Dielectric Boundaries: Free Fermion Point and Universality

B. Jancovici·L. Šamaj

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Abstract

A two-component Coulomb gas confined by walls made of ideal dielectric material is considered. In two dimensions at the special inverse temperature $β= 2$, by using the Pfaffian method, the system is mapped onto a four-component Fermi field theory with specific boundary conditions. The exact solution is presented for a semi-infinite geometry of the dielectric wall (the density profiles, the correlation functions) and for the strip geometry (the surface tension, a finite-size correction of the grand potential). The universal finite-size correction of the grand potential is shown to be a consequence of the good screening properties, and its generalization is derived for the conducting Coulomb gas confined in a slab of arbitrary dimension $\ge 2$ at any temperature.

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B. Jancovici, L. Šamaj. 2001-01-04. Coulomb Systems with Ideal Dielectric Boundaries: Free Fermion Point and Universality. https://arxiv.org/abs/cond-mat/0101046

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