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From Magnons to Solitons

  • D. C. Mattis
Part of the NATO Advanced Science Institute Series book series (NSSB, volume 88)

Abstract

This article concerns magnetism in nonmetallic solids. The analogy between magnons and phonons is established. Then, the exact 1- and 2-magnon spectra of ferromagnets are obtained, with bound states and scattering states being analyzed separately. The many-magnon states are obtained in a low-density approximation, and the effects of surfaces assessed.

In antiferromagnetism, the XY and XYZ (Heisenberg) antiferro-magnets are solved exactly in one dimension by means of Bethe’s ansatz.

Finally, the topological excitationk known as “solitons” are introduced, their nonlinear equations of motion are solved exactly, and various properties derived semi-rigorously.

Keywords

Ground State Energy Spin Wave Heisenberg Model Elementary Excitation Bound State Energy 
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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References

  1. 1.
    D. C. Mattis, The Theory of Magnetism, Vol. I (Springer, Berlin, New York, 1980). We shall refer to this book as Ml and to Vol. II (in preparation) as M2.Google Scholar
  2. 2.
    H. Fogedby, J. Phys. A 13, 1467 (1980).MathSciNetADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • D. C. Mattis
    • 1
  1. 1.Department of PhysicsUniversity of UtahSalt Lake CityUSA

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