Introductory Remarks

  • A. B. Lidiard
Conference paper
Part of the The IBM Research Symposia Series book series (IRSS)


The papers in this section represent four different aspects of the theory of point defects and dislocations in crystalline solids: (i) static or, more accurately, thermodynamic properties of point defects (Lidiard and Norgett and Builough) (ii) dynamic and optical properties of point defects (Balkanski) (iii) properties of the dislocation core (Bullough) and (iv) dislocation properties dependent on their long-range elastic strain fields (Lothe). These papers are representative of important aspects of the theory of the defect solid state. An apparent asymmetry in the coverage of topics provided by the four papers comes about (a) because point defects in contrast to dislocations, are all ‘core’ in the sense that their most important properties are determined by what happens in the immediate vicinity of the defect where continuum elasticity theory cannot be used, and (b) because the study of localised and perturbed electronic and vibrational states in the vicinity of dislocation cores has proved more difficult than the corresponding studies for point defects, although some studies of the perturbation by dislocations of localised or more accurately resonant modes due to point defects show promise (Busse and Haider1). The most obvious gaps in the coverage offered by these are two. The first is the absence of a detailed discussion of the theory of localised electronic states, e.g. colour centres, where a variety of approaches are in use; some of these are very analogous to those used in molecular theory.


Point Defect Vibrational State Dislocation Core Introductory Remark Localise Vibrational Mode 


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  1. 1.
    G. Busse and G. Haider, Optics Commun. 2, 45 (1970).ADSCrossRefGoogle Scholar
  2. 2.
    For a general review see e.g. A Rahman in The Growth Points of Physics (European Physical Society 1969) p. 315.Google Scholar
  3. 3.
    See e.g. C. Erginsoy, G.H. Vineyard and A. Englert, Phys. Rev. 133, A595 (1964); C. Erginsoy, G.H. Vineyard and A. Shimizu, Ibid 139, A118 (1965); I.M. Torrens and M. T. Robinson in Proceedings of the Battelle Colloquium on Interatomic Potentials and Simulation of Lattice Defects (June 1971), to be published.Google Scholar
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    F. P. Larkins and A. M. Stoneham, J. Phys. C, 4, 143 and 154 (1971).Google Scholar

Copyright information

© Plenum Press, New York 1972

Authors and Affiliations

  • A. B. Lidiard
    • 1
  1. 1.Theoretical Physics DivisionA.E.R.E.Harwell, Berks.UK

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