Ab initio and photoemission study of correlation effects in $SrRuO_3$ thin films

Grebinskij, S.; Lisauskas, V.; Jonauskas, V.; Mickevicius, S.; Masys, S.

doi:10.1103/PhysRevB.87.035106

Report/Journal Article

Ab initio and photoemission study of correlation effects in $SrRuO_3$ thin films

Grebinskij, S. (Corresponding author)Extern* ; Masys, S. (Corresponding author) ; Mickevicius, S. (Corresponding author)Extern* ; Lisauskas, V. (Corresponding author) ; Jonauskas, V. (Corresponding author) ; DESY

2013
APS College Park, Md.

Physical review / B 87(3), 035106 (2013) [10.1103/PhysRevB.87.035106]

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Please use a persistent id in citations: doi:10.1103/PhysRevB.87.035106 doi:10.3204/PHPPUBDB-24010

Report No.: DESY-D-I-20100305 EC.

Abstract: We present the experimental and theoretical study of correlation effects in epitaxial SrRuO$_3$ thin films. Experimentally, we have performed resonant ultraviolet photoemission spectroscopy (UPS) and angle-resolved hard x-ray photoemission spectroscopy (HAXPES) measurements. For resonant UPS, the two methods, Fano-profile fitting of constant initial state spectra and the energy distribution curves equidistant difference spectra, were used to extract Ru 4$d$ partial spectral weight (PSW) in the valence band. We find Ru 4$d$ PSW possessing a clearly pronounced coherent peak at the Fermi level together with angle-resolved HAXPES spectra demonstrating no difference in surface and bulk electronic structure. From comparison of experimental data with theoretical calculations done at density functional theory level, we conclude that SrRuO$_3$ is a weakly correlated material and electronic structure of it can be consistently described employing first-principles approaches.

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