用太赫兹磁谱法探测$\text{Er}_{x}\ maththrm {Y}_{1-x}\text{FeO}_{3}$的低温相变

2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Pub Date : 2020-11-08 DOI:10.1109/IRMMW-THz46771.2020.9370778

N. M. Peraca, M. Bamba, K. Hayashida, X. Li, X. Ma, T. Makihara, D. F. Padilla, C. Huang, E. Morosan, H. Pu, S. Cao, J. Kono

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引用次数: 0

摘要

我们研究了稀土正铁氧体$\text{Er}_{x}\ maththrm {Y}_{1-x}\text{FeO}_{3}$的太赫兹响应随磁场、温度和钇成分($x$)的变化规律。通过基于扩展迪克哈密顿量的理论建模，我们对该磁系统所表现出的低温相变中Er自旋和Fe磁振子之间的合作“超辐射”相互作用提供了新的见解。

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Probing the Low-Temperature Phase Transition in $\text{Er}_{x}\mathrm{Y}_{1-x}\text{FeO}_{3}$ by Terahertz Magnetospectroscopy

We have studied the terahertz response of the rare-earth orthoferrite $\text{Er}_{x}\mathrm{Y}_{1-x}\text{FeO}_{3}$ as a function of magnetic field, temperature, and yttrium composition ($x$). Through theoretical modelling based on an extended Dicke Hamiltonian, we provide new insight into the role of cooperative, “superradiant” interactions between Er spins and Fe magnons in the low-temperature phase transition that this magnetic system exhibits.

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2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

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