Phase diagram of a bulk 1d lattice Coulomb gas

V. Démery, R. Monsarrat, D. S. Dean et R. Podgornik, EPL 113 18008.

The exact solution, via transfer matrix, of the simple one dimensional lattice Coulomb gas (1d LCG) model can reproduce peculiar features of ionic liquid capacitors, such as overscreening, layering, and camel- and bell-shaped capacitance curves. Using the same transfer matrix method, we now compute the bulk properties of the 1d LCG in the constant voltage ensemble. We unveil a phase diagram with rich structure exhibiting a low density disordered and high density ordered phases, separated by a first order phase transition at low temperature; the solid state at full packing can be ordered or not, depending on the temperature. This phase diagram, which is strikingly similar to its three dimensional counterpart, also sheds light on the behaviour of the confined system.

Top


See also...

On the cover !

The recent work on adhesion and wetting of soft elastic particles, by the group of Élie Raphaël, has been selected to be on the cover of Soft (...) 

> More...

The range and nature of effective interactions in hard-sphere solids

The range and nature of effective interactions in hard-sphere solids Michael Schindler and A. C. Maggs Soft Matter 12 (2016) 2612 (...) 

> More...