Christensen, NB and McMorrow, DF and Ronnow, HM and Harrison, A and Perring, TG and Coldea, R (2004) Deviations from linear spin wave theory in the 2D, S=1/2 Heisenberg antiferromagnet CFTD. In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. (pp. 896 - 897). ELSEVIER SCIENCE BV
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Abstract
The spin excitation spectrum in the 2D square lattice Heisenberg antiferromagnet CFTD has been investigated using time-of-flight neutron scattering. The magnon dispersion and intensities have been determined as a function of wavevector Q in the full Brillouin zone. Both quantities are found to deviate significantly from the predictions of linear spin wave theory for wavevectors in the vicinity of Q = (pi, 0), whereas good agreement is found near Q = (pi/2, pi/2). (C) 2004 Published by Elsevier B.V.
| Type: | Proceedings paper |
|---|---|
| Title: | Deviations from linear spin wave theory in the 2D, S=1/2 Heisenberg antiferromagnet CFTD |
| Event: | International Conference on Magnetism (ICM 2003) |
| Location: | Rome, ITALY |
| Dates: | 2003-07-27 - 2003-08-01 |
| DOI: | 10.1016/j.jmmm.2004.01.056 |
| Keywords: | antiferroinagnetism, spin wave, SQUARE LATTICE |
| UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
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