Optical investigation of the electronic structures of Y2Ru2O7, CaRuO3, SrRuO3, and Bi2Ru2O7 -: art. no. 245107
Optical investigation of the electronic structures of Y2Ru2O7, CaRuO3, SrRuO3, and Bi2Ru2O7 -: art. no. 245107
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DOI：
10.1103/physrevb.64.245107
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发表时间：
2001-12-15
影响因子：
3.7
通讯作者：
Kanno, R
中科院分区：
文献类型：
--
作者：
Lee, JS;Lee, YS;Kanno, R
通过在5 meV-12 eV宽能区的光学电导分析，研究了Y2 Ru 2 O 7，CaRuO 3，SrRuO 3和Bi 2 Ru 2 O 7等带宽可控的钌酸盐的电子结构.我们可以分配光学跃迁的光谱的系统变化，并通过比较与O 1 s的X射线吸收数据。我们估计了一些物理参数，如在位库仑排斥能和晶场分裂能。这些参数表明，4d轨道应比3d轨道扩展得更多。这些结果也讨论了Mott-Hubbard模型。
We investigated the electronic structures of the bandwidth-controlled ruthenates, Y2Ru2O7, CaRuO3, SrRuO3, and Bi2Ru2O7, by optical conductivity analysis in a wide energy region of 5 meV-12 eV. We could assign optical transitions from the systematic changes of the spectra and by comparison with the O 1s x-ray absorption data. We estimated some physical parameters, such as the on-site Coulomb repulsion energy and the crystal-field splitting energy. These parameters show that the 4d orbitals should be more extended than 3d ones. These results are also discussed in terms of the Mott-Hubbard model.