CPA theory for jump diffusion of particles in periodic lattices

Kimmo Kaski, Raza A. Tahir-Kheli, R.J. Elliott

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

Abstract

The incoherent dynamical structure factor and the diffusion coefficient of the nearest neighbour (NN) jump diffusion model is studied. Diffusion of a specific particle in a static but random arrangement of background particles is considered. The virtual crystal approximation and coherent potential approximation procedures are used to find solutions. First five exact frequency moments of the spectral density are calculated and compared with those given by these theories. In simple cubic and body-centred cubic lattices four first moments are exactly reproduced by the CPA solution.
Original languageEnglish
Pages (from-to)209-220
JournalJournal of Physics C: Solid State Physics
Volume15
Issue number2
DOIs
Publication statusPublished - 1982
MoE publication typeA1 Journal article-refereed

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