Evidence against strong correlation in 4d transition metal oxides, CaRuO3 and SrRuO3

Details Evidence against strong correlation in 4d transition metal oxides, CaRuO3 and SrRuO3 Evidence against strong correlation in 4d transition metal oxides, CaRuO3 and SrRuO3

2005-04-19

arxiv.org/abs/cond-mat/0504466v1

Phys. Rev. B (Rapid Communications) 71, 161102 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.71.161102

We investigate the electronic structure of 4d transition metal oxides, CaRuO3 and SrRuO3. The analysis of the photoemission spectra reveals significantly weak electron correlation strength (U/W ~ 0.2) as expected in 4d systems and resolves the long standing issue that arose due to the prediction of large U/W similar to 3d-systems. It is shown that the bulk spectra, thermodynamic parameters and optical properties in these systems can consistently be described using first principle approaches. The observation of different surface and bulk electronic structures in these weakly correlated 4d systems is unusual.

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