Reply to "Comment on 'Evidence for strong electronic correlations in the spectra of Sr2 Ru O4'"

Z. V. Pchelkina, I. A. Nekrasov, Th Pruschke, S. Suga, V. I. Anisimov, D. Vollhardt

Research output: Contribution to journalComment/debate

4 Citations (Scopus)

Abstract

In a recent publication, we presented clear evidence that Coulomb correlations play a key role in the electronic structure of Sr2 Ru O4. First, we obtained a mass enhancement with respect to the band mass of about 2.5 for Ru 4d states. Second, a Hubbard satellite formed by the Ru 4d states was found at -3 eV. These two facts perfectly agree with known experimental results. Here, we show that our linear muffin-tin orbital band structure is very similar to the linearized augmented plane wave data presented by Singh in his Comment. Moreover, we argue that the cross section of O 2p states in the photoemission experiments with high photon energy is much smaller than that of the Ru 4d states. Therefore, although the oxygen 2p nonbonding states as pointed out by Singh are dominant in the band structure of Sr2 Ru O4 for energies around -3 eV, they almost do not contribute to the spectra measured with high photon energies. Also, the mass enhancement can not be obtained within plain band structure calculations. We, thus, believe that a proper inclusion of Coulomb correlations is of crucial importance for a correct description of the electronic structure of Sr2 Ru O4.

Original languageEnglish
Article number046102
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number4
DOIs
Publication statusPublished - 30 Jan 2008
Externally publishedYes

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