Thomas-Fermi gold capacitor example
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2D box with planar gold electrodes, modelled with a 
Thomas-Fermi length of 1.0 angstrom, with an aqueous sodium 
chloride electrolyte. NVT simulation at constant potential 
difference of 1V solved using matrix inversion.

Typical input from:
- Dufils, Scalfi, Rotenberg, Salanne
A semiclassical Thomas-Fermi model to tune the metallicity of electrodes in molecular simulations
arXiv, 1910.13341, 2019
