A Green Function Approach to Two-Magnon Light Scattering in Antiferromagnets at T < TN

  • M. G. Cottam
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 35)


In this paper we describe some calculations for the temperature dependence of two-magnon light scattering in antiferromagnets. This involves using a Green function diagrammatic perturbation expansion to generalise the zero temperature results of Elliott and Thorpe1 to T ≠ O. The theory and results are described here only in outline, whilst details are given in refs.2,3 and 4. Other calculations for two-magnon light scattering at T ≠ O have recently been reviewed by Balucani and Tognetti5. In section 2 we describe the Green function perturbation formalism and its application to evaluating the two-magnon scattering cross-section. In section 3 the theory is applied to several antiferromagnets for T < TN and comparison is made with experimental data.


Green Function Rutile Structure Molecular Field Approximation Molecular Field Theory Quasiparticle Interaction 
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Copyright information

© Plenum Press, New York 1978

Authors and Affiliations

  • M. G. Cottam
    • 1
  1. 1.Physics DepartmentUniversity of EssexColchesterEngland

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