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Zeitschrift für Physik B Condensed Matter

, Volume 89, Issue 3, pp 313–320 | Cite as

Raman scattering from antiferromagnetic spin fluctuations

  • Arno P. Kampf
  • Wolfram Brenig
Original Contributions

Abstract

A microscopic theory for the scattering of light from spin fluctuation pair modes in the two-dimensional Hubbard model is presented. Two-spin fluctuation processes with opposite momenta near the antiferromagnetic wave vectorQ=(π, π) are shown to contribute in particular to the low energy part of the Raman cross section. We explicitly investigate the influence of the Raman vertex function that describes the coupling of the Raman vertex function that describes the coupling of the light to the electrons and distinguishes between the different scattering geometries. In addition we explore the dependence on the correlation strength and on the temperature.

Keywords

Neural Network Complex System Nonlinear Dynamics Hubbard Model Microscopic Theory 
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

© Springer-Verlag 1992

Authors and Affiliations

  • Arno P. Kampf
    • 1
  • Wolfram Brenig
    • 2
  1. 1.Institut für Festkörperforschung Forschungszentrum JülichJülichGermany
  2. 2.Institut für Theoretische PhysikUniversität zu KölnKöln 41Germany

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