Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-04-26
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 11 figures, accepted for publication in Physical Review B
Scientific paper
10.1103/PhysRevB.72.014413
The low-temperature magnetic excitations of the two-dimensional spin-5/2 square-lattice Heisenberg antiferromagnet Rb2MnF4 have been probed using pulsed inelastic neutron scattering. In addition to dominant sharp peaks identified with one-magnon excitations, a relatively weak continuum scattering is also observed at higher energies. This is attributed to neutron scattering by pairs of magnons and the observed intensities are consistent with predictions of spin wave theory.
Christianson John Robert
Coldea Radu
Cowley R. A.
Frost Carol D.
Huberman T.
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