High-temperature magnetic anomaly in the Kitaev hyperhoneycomb compound β−Li2IrO3
High-temperature magnetic anomaly in the Kitaev hyperhoneycomb compound β−Li2IrO3
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Kitaev超蜂窝状化合物βLi2IrO3中的高温磁异常
DOI：
10.1103/physrevb.101.075112
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发表时间：
2020
影响因子：
3.7
通讯作者：
Frandsen, Benjamin A.
中科院分区：
文献类型：
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作者：
Ruiz, Alejandro;Nagarajan, Vikram;Vranas, Mayia;Lopez, Gilbert;McCandless, Gregory T.;Kimchi, Itamar;Chan, Julia Y.;Breznay, Nicholas P.;Frañó, Alex;Frandsen, Benjamin A.
我们报道了三维Kitaev候选材料中存在高温磁反常现象。异常的特征出现在磁化强度、热容和Muon自旋弛豫测量中。磁化的开始与磁化主轴的重新排序相吻合，这被认为与系统中基塔耶夫式关联的开始有关。该异常还显示了磁滞，其空间各向异性量级遵循着潜在的Kitaev哈密顿量的自旋-各向异性交换各向异性。我们讨论了散装和杂质来源的可能情况。
We report the existence of a high-temperature magnetic anomaly in the three-dimensional Kitaev candidate material,. Signatures of the anomaly appear in magnetization, heat capacity, and muon spin relaxation measurements. The onset coincides with a reordering of the principal axes of magnetization, which is thought to be connected to the onset of Kitaev-like correlations in the system. The anomaly also shows magnetic hysteresis with a spatially anisotropic magnitude that follows the spin-anisotropic exchange anisotropy of the underlying Kitaev Hamiltonian. We discuss possible scenarios for a bulk and impurity origin.