Direct evidence for anisotropic magnetic interaction in $α$-RuCl$_3$ from polarized inelastic neutron scattering

Markus Braden, Xiao Wang, Alexandre Bertin, Paul Steffens, Yixi Su
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Abstract

Polarized neutron scattering experiments reveal the anisotropy of magnetic correlations in the candidate Kitaev material $\alpha$-RuCl$_3$. The anisotropy of the inelastic response at the magnetic Bragg positions is just opposite to the expectation for a simple Heisenberg model. Near the antiferromagnetic $q$ vector, there are no low-energy transversal magnon modes directly documenting the fully anisotropic and bond-directional character of the magnetic interaction in $\alpha$-RuCl$_3$. However, other findings disagree with a simple or strongly dominant Kitaev component.
极化非弹性中子散射直接证明了 $α$-RuCl$_3$ 中各向异性的磁相互作用
偏振中子散射实验揭示了候选基塔耶夫材料$\alpha$-RuCl$_3$中磁性相关性的各向异性。在磁布拉格位置的非弹性响应的各向异性与简单海森堡模型的预期正好相反。在反铁磁$q$矢量附近,不存在低能横向磁子模式,这直接证明了$\α$-RuCl$_3$中磁性相互作用的完全各向异性和键方向性。然而,其他发现与简单或强主导基塔耶夫成分不符。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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