Lattice gas model on tetrahedral sites of a BCC lattice

Research output: Article

13 Citations (Scopus)

Abstract

A lattice gas model is suggested for describing the order-disorder transition of mobile particles in BCC cage lattices such as α-AgI, Ag 2S, NbH x, etc. The effect of repulsive first- and second-neighbour interactions is studied by a six sub-lattice mean-field approximation. With a fixed number of mobile particles determined by the composition of AgI the mean-field approximation predicts that the disordering process strongly depends on the ratio of the second- and first-neighbour interactions. Beside the low-temperature ordered state and the high-temperature random distribution two further intermediate states are found to be stable. This fact results in three different kinds of disordering process. The results suggest a new interpretation of the alpha phase of AgI.

Original languageEnglish
Pages (from-to)3775-3787
Number of pages13
JournalJournal of Physics C: Solid State Physics
Volume19
Issue number20
DOIs
Publication statusPublished - júl. 20 1986

Fingerprint

body centered cubic lattices
Gases
Order disorder transitions
statistical distributions
approximation
gases
interactions
disorders
Temperature
Chemical analysis

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Lattice gas model on tetrahedral sites of a BCC lattice. / Szabó, G.

In: Journal of Physics C: Solid State Physics, Vol. 19, No. 20, 20.07.1986, p. 3775-3787.

Research output: Article

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