Nature of the electronic states in the layered perovskite noncuprate superconductor Sr2RuO4

M. Schmidt; T. R. Cummins; M. Bürk; D. H. Lu; N. Nücker; S. Schuppler; F. Lichtenberg

doi:10.1103/PhysRevB.53.R14761

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Nature of the electronic states in the layered perovskite noncuprate superconductor Sr2RuO4

M. Schmidt, T. R. Cummins, M. Bürk, D. H. Lu, N. Nücker, S. Schuppler, F. Lichtenberg

DOI 10.1103/PhysRevB.53.R14761 · Physical Review B

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Abstract

Near-edge x-ray-absorption and photoemission spectra of the noncuprate superconductor Sr2RuO4 are presented. Holes close to the Fermi level are determined by Ru 4dxy, 4dxz, and 4dyz antibonding states. The density of the occupied states at the Fermi level derived from photoemission is higher than in the cuprates and these states have predominantly Ru 4d character. Angle-resolved photoemission yields a width of the occupied part of the conduction bands that is reduced by a factor of 2 in comparison to band-structure calculations. The importance of electron correlations is also evident in the appearance of screened final states in the Ru 3d core-level spectrum.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.93	Pressure not reported	unknown
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	Pressure not reported	unknown