Abstract
The out-of-plane dynamical correlation functionsS zz(q, ω) for two-dimensional easy-plane ferro- and antiferromagnets are calculated using a diagrammatic expansion for the temperature dependent Green function. Vortex-magnon interference effects on the multimagnon and vortex contribution toS zz(q, ω) are also analised, in a classical context, for ferromagnets. Our calculations show that we cannot expect multimagnon processes to contribute to a central peak (ω=0) that has been observed in these systems for temperaturesT>T c , whereT c is the temperature at which a topological phase transition is predicted to occur. However, vortex-magnon interactions considerably reduce the intensity of the vortex induced central peak.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Regnault, L.P., Rossad-Mignod, J.: In: Magnetic properties of layered transition metal compounds. Jongh L.J. de, Willet, R.D. (eds.). Dordrecht: Reidel 1987
Kosterlitz, J.M., Thouless, B.J.: J. Phys. C7, 1047 (1974)
Pokrovskii, V.L., Feigel'man, M.V.: Sov. Phys. Solid State19, 1446 (1977)
Kosevich, YuA., Chubukov, A.V.: Sov. Phys. JETP64, 654 (1986)
Khveshchenko, D.V.: Sov. Phys. JETP67, 1619 (1988)
Becher, T., Reiter, G.: Phys. Rev. Lett.63, 1004 (1989)
Mertens, F.G., Bishop, A.R., Wysin, G.M., Kawabata, C.: Phys. Rev. B39, 591 (1989)
Gouvêa, M.E., Wysin, G.M., Bishop, A.R., Mertens, F.G.: Phys. Rev. B39, 11840 (1989)
Abrikosov, A.A., Gorkov, L.P., Dzyaloshinskii, I.E.: Methods of quantum field theory in statistical physics. Englewood Cliffs: Prentice-Hall 1963
Villain, J.: J. Phys. C6, L97 (1973); J. Phys. (Paris)35, 27 (1974)
Wright, N.F., Johnson, M.D., Fowler, M.: Phys. Rev. B32, 3169 (1985)
Conrado, C.V., Pires, A.S.T.: Z. Phys. B — Condensed Matter76, 225 (1989);76, 235 (1989)
Mattuck, R.D.: A guide to Feynmann diagrams in the many-body problem. New York: McGraw-Hill 1976
Kawabata, C., Bishop, A.R.: Solid State Commun.60, 169 (1986)
Bramwell, S.T., Hutchings, M.T., Norman, J., Pynn, R., Day, P.: Proceedings of International Conference on Magnetism (Paris, 1988). J. Phys. (Paris) Colloq.
Wysin, G.M., Gouvêa, M.E., Bishop, A.R., Mertens, F.G.: In: Computer simulation studies in condensed matter physics: recent developments. p. 40. Berlin, Heidelberg, New York: Springer 1988
Côté, R., Griffin, A.: Phys. Rev. B34, 6240 (1986)
Nelson, D.R., Kosterlitz, J.M.: Phys. Rev. Lett.39, 1201 (1979)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Menezes, S.L., Gouvêa, M.E. & Pires, A.S.T. Calculation of the out-of-plane dynamical correlation for two-dimensional magnetic systems. Z. Physik B - Condensed Matter 82, 375–381 (1991). https://doi.org/10.1007/BF01357182
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01357182