Probing Kitaev interactions in a quantum-spin-liquid candidate alpha-RuCl3 via polarized neutron scattering
Considerable research has been focused on the effects of spin-orbit coupling (SOC) in transition metal compounds because they are responsible for exotic topological features. In particular, SOC has also been identified to be critical in realizing the Kitaev spin liquid states. Recently, the layered honeycomb magnet alpha-RuCl3 has been proposed as a candidate to realize the Kitaev spin physics. In our previous work, we have detected a broad continuum centering at the Brillouin zone center (Gamma point), which may result from a spin-liquid phase with an antiferromagnetic Kitaev exchange interaction. In order to clarify whether this continuous mode is of pure magnetic origin or has some contributions from nuclear (coherent/incoherent), we propose to perform polarization measurements on RuCl3 single crystals. IN22 with the polarized option is an ideal instrument for our purpose. Totally, we ask for 8 days (3 days unpolarized+5 days polarized) on IN22. If IN22 is not available, IN20 will also work for us.
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Kejing Ran; BOURDAROT Frederic; REGNAULT Louis Pierre; SCHMIDT Wolfgang F; Yixi Su; WANG Xiao and ZHU Fengfeng. (2018). Probing Kitaev interactions in a quantum-spin-liquid candidate alpha-RuCl3 via polarized neutron scattering. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-05-689
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