| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1385 - C8-1386 | |
| DOI | https://doi.org/10.1051/jphyscol:19888635 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1385-C8-1386
DOI: 10.1051/jphyscol:19888635
1 Physics Institute, University of Bayreuth, D-8580 Bayreuth, F. R. G.
2 Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
J. Phys. Colloques 49 (1988) C8-1385-C8-1386
DOI: 10.1051/jphyscol:19888635
DYNAMICS OF UNBOUND VORTICES IN THE 2-DIMENSIONAL XYAND ANISOTROPIC HEISENBERG MODELS
F. G. Mertens1, A. R. Bishop2, M. E. Gouvea2 et G. M. Wysin21 Physics Institute, University of Bayreuth, D-8580 Bayreuth, F. R. G.
2 Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Abstract
Assuming an ideal gas of vortices above the Kosterlitz-Thouless transition temperature, the dynamic form factors are calculated. For the in-plane correlations a Lorentzian central peak is predicted which is independent of the vortex size and shape. However, for the out-of-plane correlations the velocity dependence of the vortex structure is decisive for the occurrence of a Gaussian central peak. Both results are in good agreement with combined Monte Carlo-molecular dynamics simulations.