Abstract
The planar triangular lattice gas with repulsive nearest-neighbor and attractive second-nearest-neighbor interactions is solved in the Bethe-Peierls approximation. The maximum temperature of transition between disordered and ordered phases occurs at a density of one-third. All transitions are first order with a discontinuity in the order parameter at the transition. Deficiencies in the approximation are noted and discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1919-1925 |
| Number of pages | 7 |
| Journal | Physical Review A |
| Volume | 5 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jan 1 1972 |