Abstract
The compositional ordering of Ag, Pb, Sb, Te ions in systems possessing a NaCl structure is studied using a Coulomb lattice gas (CLG) model on a face-centered cubic (fcc) lattice and Monte Carlo simulations. Our results show different possible microstructural orderings. Ordered superlattice structures formed out of layers separated by layers are observed for a large range of values. For , we see an array of tubular structures formed by and blocks. For , has a body-centered tetragonal (bct) structure which is in agreement with previous Monte Carlo simulation results for restricted primitive model (RPM) at closed packed density. The phase diagram of this frustrated CLG system is discussed.
- Received 4 March 2005
DOI:https://doi.org/10.1103/PhysRevB.72.064102
©2005 American Physical Society