Observation of two fine structures related to the hidden order in the spectral functions of URu 2 Si 2
Observation of two fine structures related to the hidden order in the spectral functions of URu 2 Si 2
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DOI：
10.1103/physrevb.85.241102
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发表时间：
2012-06
影响因子：
3.7
通讯作者：
R. Yoshida;M. Fukui;Y. Haga;E. Yamamoto;Y. Ōnuki;M. Okawa;W. Malaeb;Shik Shin;Y. Muraoka;T. Yokoya
中科院分区：
文献类型：
--
作者：
R. Yoshida;M. Fukui;Y. Haga;E. Yamamoto;Y. Ōnuki;M. Okawa;W. Malaeb;Shik Shin;Y. Muraoka;T. Yokoya
本文用超高分辨角分辨光电子能谱研究了URu${}_{2}$Si${}_{2}$在隐序态的光谱函数。高信噪比数据揭示了两个异常精细结构的存在，即在先前报道的窄色散带中的“分裂”和小的无色散的“卫星”结构。这些结构既不能用普通的能带来解释，也不能用两个态的杂化来解释;因此，我们的观察应该引起对复杂的多体效应的考虑。作为一个可能的起源，我们建议在有序态的电子模式耦合的存在。
We studied the spectral functions of URu${}_{2}$Si${}_{2}$ in the hidden-order state by means of ultrahigh-resolution angle-resolved photoemission spectroscopy. High signal-to-noise ratio data uncover the existence of two anomalous fine structures, namely a ``splitting'' in the previously reported narrow dispersive band, and a small, dispersionless ``satellite'' structure. These structures can be explained by neither ordinary bands nor the development of a hybridization of two states; thus our observation should evoke the consideration of complicated many-body effects. As a possible origin, we suggest the existence of electron-mode coupling in the ordered state.