Correlation effects in Sr2RuO4 and Ca 2RuO4

Valence-band photoemission spectra and self-energy calculations

T. T. Tran, Takashi Mizokawa, S. Nakatsuji, H. Fukazawa, Y. Maeno

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We have studied the electronic structure of Sr2RuO4 and Ca2RuO4 using x-ray photoemission spectroscopy (XPS) and subsequent model calculations. While the t2g band of Sr 2RuO4 has substantial spectral weight at the Fermi level, that of Ca2RuO4 has no spectral weight at EF and shows a peak at -1.8 eV. In the valence-band XPS spectrum of Sr 2RuO4, a satellite structure of the t2g band is observed. In order to explain the spectral features, we have carried out band-structure calculations using the unrestricted Hartree-Fock (HF) approximation and found good agreement with the experimental result for Ca 2RuO4. In order to explain the satellite structure of Sr2RuO4, we have performed second-order perturbation calculations of the self-energy corrections around the unrestricted HF solution of Sr2RuO4.

Original languageEnglish
Article number153106
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number15
DOIs
Publication statusPublished - 2004 Oct
Externally publishedYes

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Photoemission
Valence bands
photoelectric emission
Photoelectron spectroscopy
valence
Hartree approximation
X rays
Fermi level
Band structure
Electronic structure
energy
spectroscopy
x rays
electronic structure
perturbation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Correlation effects in Sr2RuO4 and Ca 2RuO4 : Valence-band photoemission spectra and self-energy calculations. / Tran, T. T.; Mizokawa, Takashi; Nakatsuji, S.; Fukazawa, H.; Maeno, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 15, 153106, 10.2004.

Research output: Contribution to journalArticle

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