Vortex signatures in dynamic structure factors for two-dimensional easy-plane ferromagnets

Journal Article · Mon Jul 06 00:00:00 EDT 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.59.117· OSTI ID:6416599

Mertens, F G; Bishop, A R; Wysin, G M; Kawabata, C

The XY and the anisotropic Heisenberg models are considered above the Kosterlitz-Thouless transition temperature. Under the assumption of a gas of freely moving vortices, it is shown that the dynamic structure factor exhibits a central peak for both in-plane and out-of-plane correlations, in good agreement with the results of a combined Monte Carlo--molecular dynamics simulation. These results are also consistent with recent neutron-scattering data on Rb/sub 2/CrCl/sub 4/ and BaCo/sub 2/(AsO/sub 4/)/sub 2/, which show qualitatively the same wave-vector and temperature dependences.

• Research Organization: Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6416599
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 59:1; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CRITICAL TEMPERATURE
CRYSTAL MODELS
FERROMAGNETIC MATERIALS
FILMS
HEISENBERG MODEL
MAGNETIC MATERIALS
MATERIALS
MATHEMATICAL MODELS
PHYSICAL PROPERTIES
STRUCTURE FACTORS
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION TEMPERATURE