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The Theory of Structural Phase Transitions: Universality and Quasi-Elastic Scattering Phenomena

  • Alastair D. Bruce
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 77)

Abstract

The theoretical study of structural phase transitions over the last decade has been dominated by two continuing concerns. Firstly, much effort has been devoted to the determination of the universal quantities — principally critical exponents — characterising critical point singularities. The surge of activity in this area is mainly attributable to the development of renormalisation group (R.G.) methods1, making it possible to explore a great wealth of critical phenomena largely inaccessible to the techniques previously available. The second dominant theme has been an ever-growing interest in the patterns of short range order (s.r.o.) underlying critical point behaviour, and the qualitative characteristics which these patterns imply for the collective excitation spectrum near criticality. The motivation for much of the work in this field has been the evidence assembled from, successively, experiments2, computer-simulation hybrids of theory and experiment3 and theory itself4, suggesting that both the excitation spectrum and the underlying configurations of s.r.o. display important features, associated with cluster walls, which are not captured by classical phonon-based theories of structural phase transitions (s.p.t.’s).

Keywords

Excitation Spectrum Short Range Order Central Peak Structural Phase Transition Critical Singularity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Alastair D. Bruce
    • 1
  1. 1.Department of PhysicsUniversity of EdinburghScotland, UK

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