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
Abstract
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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