Abstract
Since its first experimental observations1 two-spin Raman scattering in antiferromangets has proved to be a very useful tool to study the high-wavevector magnetic excitations in these systems. The scattering cross section turns out2 to be proportional to the Fourier transform of <M(O)N(t)> where the Raman transition operator is given by
Here \({\vec S_k}\) is the space Fourier transform of the site spin operators and Φk is a weighting factor determined by the field polarizations and by crystal symmetry. In the following we shall explicitly refer to three-dimensional cubic antiferromagnets like RbMnF3 and KNiF3, which are well described by a Heisenberg Hamiltonian with exchange J limited to the z nearest neighbours of a given spin.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
P.A. FLEURY, these Proceedings (and references therein).
M.F. THORPE, these Proceedings.
See, however, the contribution by M.G.COTTAM in these Proceedings (where spin operators are used].
U. BALUCANI and V. TOGNETTI, Phys.Rev. B8, 4247 (1973).
R.W. DAVIES, S.R. CHINN and H.J. ZEIGER, Phys.Rev. B4, 992 (1971).
P.A. FLEURY, W. HAYES and H.J. GUGGENHEIM, J.Phys.C 8,2183 (1975).
D. J. LOCKWOOD and G.J. COONBS, J.Phys.C 8, 4062 (1975).
A.VAN DER POL et al., Solid State Com.19,177 (1976);
W. LEHMANN and R. WEBER, J.Phys.C 10, 97 (1977).
H. MORI, Progr.Theor.Phys. 33,423(1965);
H. MORI, Progr.Theor.Phys. 34,399 (1965).
U. BALUCANI and V. TOGNETTI, Phys.Rev. B16,271 (1977).
P.M. RICHARDS and J.W. BRYA, Phys.Rev. B9, 3044 (1974).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1978 Plenum Press, New York
About this chapter
Cite this chapter
Balucani, U., Tognetti, V. (1978). Two-Spin Light Scattering in Heisenberg Antiferromagnets. In: Halley, J.W. (eds) Correlation Functions and Quasiparticle Interactions in Condensed Matter. NATO Advanced Study Institutes Series, vol 35. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-3360-9_7
Download citation
DOI: https://doi.org/10.1007/978-1-4684-3360-9_7
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-3362-3
Online ISBN: 978-1-4684-3360-9
eBook Packages: Springer Book Archive