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Two-Magnon Excitations Observed by Neutron Scattering in the Two-Dimensional Spin-5/2 Heisenberg Antiferromagnet Rb2MnF4

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Title

Two-Magnon Excitations Observed by Neutron Scattering in the Two-Dimensional Spin-5/2 Heisenberg Antiferromagnet Rb2MnF4

Author(s)

Huberman, T.
Oxford Physics, Clarendon Laboratory
Coldea, R.
Oxford Physics, Clarendon Laboratory
Cowley, R. A.
Oxford Physics, Clarendon Laboratory
Tennant, D. A.
University of St. Andrews, Scotland, United Kingdom
Leheny, R. L.
Christianson, Rebecca J.
Frost, C. D.

Description

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.

Date Published

2018-03-26 15:09:04

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  • Download Christianson_TwoMagnon.pdf

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