Inverse melting in lattice-gas models
| dc.creator | Prestipino, S. | |
| dc.date | 2007-01-16 | |
| dc.date.accessioned | 2026-07-07T07:41:12Z | |
| dc.date.available | 2026-07-07T07:41:12Z | |
| dc.description | Inverse melting is the phenomenon, observed in both Helium isotopes, by which a crystal melts when cooled at constant pressure. I investigate discrete-space analogs of inverse melting by means of two instances of a triangular-lattice-gas system endowed with a soft-core repulsion and a short-ranged attraction. To reconstruct the phase diagram, I use both transfer-matrix and Monte Carlo methods, as well as low-temperature series expansions. In one case, a phase behavior reminiscent of Helium emerges, with a loose-packed phase (which is solid-like for low temperatures and liquid-like for high temperatures) extending down to zero temperature for low pressures and the possibility of melting the close-packed solid by isobaric cooling. At variance with previous model studies of inverse melting, the driving mechanism of the present phenomenon is mainly geometrical, related to the larger free-energy cost of a ``vacancy'' in the loose-packed solid than in the close-packed one. | |
| dc.description | 10 pages, 12 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0701369 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0701369 | |
| dc.identifier | Phys. Rev. E 75 (2007) 011107 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/122022 | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Materials Science | |
| dc.title | Inverse melting in lattice-gas models | |
| dc.type | text |