English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Local, or short-range, order in disordered alloys is an important andexciting phenomenon which is quantified in electron, X-ray and neutronscattering experiments. It is discussed in many excellent reviews and books, aswell as in the multitude of original research papers.  This relatively short review of the subject does not attempt to discuss allaspects of the problem of local correlations in alloys. In particular, we willnot touch such issues as multiatom (cluster) interactions, static displacementsand vibrations of alloy atoms, partially ordered, multicomponent or amorphousalloys. As a result, we will concentrate on the Hamiltonian traditional for theconsidered problem, that of the Ising model on a rigid ideal lattice with pair,but otherwise arbitrary (i.e., of any range) interatomic interactions.  The central object of the paper is the pair correlation function of thecorresponding dynamical variables of the model, the occupation numbers or spinvariables, the Fourier transform of which is proportional to the intensity ofdiffuse scattering caused by atomic short-range order. The main aim is to showthat the expression for this quantity has certain internal structure analogous,e.g., to that of the averaged Green's function used in the electronic theory ofdisordered alloys. This structure is independent of the approximation used forthe quantitative description of correlations. As will be seen, this structurealone, without further specification of a particular theory of short-rangeorder, allows us to see new possibilities in diffuse scattering, some of whichhave recently been observed experimentally.

Non-Mean-Field Theories of Short Range Order and Diffuse Scattering Anomalies in Disordered Alloys