Coupling between Mott excitation and d－d transitions in CoV2O4
Coupling between Mott excitation and d－d transitions in CoV2O4
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CoV2O4 中莫特激发与 d－d 跃迁之间的耦合
DOI：
10.1103/physrevb.92.140401
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
and T. Katsufuji
中科院分区：
文献类型：
--
作者：
H. Nishihara;A. Furuhashi;N. Yamaguchi;R. Koborinai;and T. Katsufuji
我们研究了Co离子的光学性质，其中V态的Mott激发产生的宽光谱和Co离子原子内跃迁产生的尖峰共存。我们发现，随着温度的降低，跃迁峰的宽度减小，稳态光谱中出现Fano共振。我们还发现，在Mott激发上加一个泵浦脉冲后，跃迁峰的宽度增加不到1ps。这些结果表明该化合物的Mott激发和跃迁是强耦合的。
We studied the optical properties of, in which a broad spectrum arising from the Mott excitation of the Vstates and sharp peaks from the intra-atomictransitions in the Co ions coexist. We found that the width of thetransition peaks decreases and that Fano resonance appears in the steady-state optical spectrum with decreasing temperature. We also found that the width of thetransition peaks increases less than 1 ps after a pump pulse is applied to the Mott excitation. These results indicate that the Mott excitation and thetransitions are strongly coupled in this compound.