Neutron Scattering Study of Topological Magnon Dispersion in CoTiO3
In common antiferromagnetic materials, magnons at the Brillouin zone boundary usually decay much faster than those at the zone center due to a high density of states. However, in a recent Raman scattering study of CoTiO3, the extremely sharp linewidth of magnon at M point suggests a long magnon life at the zone boundary, exhibiting a peculiar momentum dependence of magnon life. Here, we propose to first confirm the feasibility of Neutron Resonance Spin Echo technique (NRSE) on our CoTiO3 sample by a regular triple-axis experiment at IN22 and then determine the intrinsic energy linewidth of the spin waves using NRSE as a function of momentum transfer approaching the zone boundary, which cannot be done by Raman scattering. Such an experiment will shed considerable new light to our understanding of magnon-magnon interaction and decay of magnons as a function of wave vector in quantum materials, particularly for possible topological quantum magnets.
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The recommended format for citing this dataset in a research publication is in the following format:
XIE Yaofeng; BOURDAROT Frederic; Bourges and Yixi Su. (2023). Neutron Scattering Study of Topological Magnon Dispersion in CoTiO3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1807
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