HIDDEN ELECTRONIC STATE OF CUO REVEALED BY RESONANT INELASTIC X-RAY SCATTERING
HIDDEN ELECTRONIC STATE OF CUO REVEALED BY RESONANT INELASTIC X-RAY SCATTERING
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共振非弹性 X 射线散射揭示了 CuO 的隐藏电子态
DOI：
10.1103/physrevb.66.033105
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发表时间：
2002
影响因子：
3.7
通讯作者：
C. Kao
中科院分区：
文献类型：
--
作者：
H. Hayashi;Y. Udagawa;W. Caliebe;C. Kao
高分辨率共振非弹性x射线散射~RIXS！测量了CuO在1s2p发射区的光谱。观察到了一组令人惊讶的复杂光谱。对这些光谱的详细分析表明，CuO的Cu-K X射线吸收谱中存在一个激发态。此外，这种激发态的能量与实空间多重散射技术预测的类Cu4PZ态很好地对应，但到目前为止还没有在实验上观察到。这一结果证明了RIXS在补充X射线吸收光谱方面的潜在用途。理解强关联过渡金属氧化物的电子结构一直是凝聚态物理学的长期挑战之一。由于高温超导体的发现，对这些氧化物的研究最近重新引起了人们的兴趣。其中，二价CuO尤其重要，因为它共享相同的基本构造块CuO4平行四边形平面，与
High-resolution resonant inelastic x-ray scattering ~RIXS! spectra from CuO in the 1s2p emission region were measured. A surprisingly complicated set of spectra was observed. Detailed analysis of these spectra reveals the existence of an excited state, which is hidden in the Cu-K x-ray absorption spectrum of CuO. Furthermore, the energy of this excited state corresponds well to a Cu 4 pz-like state predicted by a real-space multiple-scattering technique, but has not been observed experimentally up to now. This result demonstrates the potential use of RIXS to complement x-ray absorption spectroscopy. Understanding the electronic structures of strongly correlated transition metal oxides has been one of the longstanding challenges in condensed matter physics. The study of these oxides has attracted renewed interest recently due to the discovery of high-Tc superconductors. Among them, divalent CuO is of particular importance because it shares the same basic building block, CuO4 parallelogram plane, with