Theory of alloys. II. Embedded-cluster calculations of phonon spectra for a one-dimensional ternary alloy

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

The embedded-cluster method is generalized for application to ternary alloys and applied to the calculation of the frequency-distribution spectra of the random, mass-disordered, one-dimensional ternary alloy AxB1-xC. The spectra for one-dimensional models of some representative III-V and II-VI ternary alloys (diatomic mixed crystals) are calculated and compared with exact numerical spectra obtained for 50 000-atom random chains by the use of the negative eigenvalue theorem. For a cluster containing eight unit cells embedded in a coherent-potential-approximation effective medium, the embedded-cluster method reproduces all of the major features of the "exact" spectra for all alloy compositions and over a wide range of mass ratios. This reconfirms the accuracy of the method and strengthens its potential practicality for application to real semiconductor alloys.

Original languageEnglish
Pages (from-to)4519-4534
Number of pages16
JournalPhysical Review B
Volume28
Issue number8
DOIs
StatePublished - 1983

Fingerprint Dive into the research topics of 'Theory of alloys. II. Embedded-cluster calculations of phonon spectra for a one-dimensional ternary alloy'. Together they form a unique fingerprint.

  • Cite this