Systematic trends in the electronic structure parameters of the4dtransition-metal oxidesSrMO3(M=Zr,Mo, Ru, and Rh)

By Y. Lee, J. S. Lee, T. Noh, D. Byun, K. Yoo, Kazunari Yamaura, E. Takayama-Muromachi. 2002

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We investigated the electronic structures of the perovskite-type 4d transition-metal oxides SrMO 3 (M =Zr, Mo, Ru, and Rh) using their optical conductivity spectra σ(ω). The interband transitions in σ(ω) are assigned, andsome important electronic structure parameters, such as charge-transfer energy Δ p d , and crystal-field splitting 10Dq, are estimated. It is observed that Δ p d and 10D q decrease systematically with increasing the atomic number of the 4d transition metal. Compared with the case of 3d oxides, the magnitudes of Δ p d and 10Dq are larger. These behaviors can be explained by the more extended nature of the orbitals in the 4d oxides.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Materials Chemistry

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