Hole-doping-induced changes in the electronic structure of La$_{1-x}$Sr$_x$FeO$_3$ : soft x-ray photoemission and absorption study of epitaxial thin films

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dc.creatorWadati, H.
dc.creatorKobayashi, D.
dc.creatorKumigashira, H.
dc.creatorOkazaki, K.
dc.creatorMizokawa, T.
dc.creatorFujimori, A.
dc.creatorHoriba, K.
dc.creatorOshima, M.
dc.creatorHamada, N.
dc.creatorLippmaa, M.
dc.creatorKawasaki, M.
dc.creatorKoinuma, H.
dc.date2004-04-19
dc.date.accessioned2026-07-07T02:57:42Z
dc.date.available2026-07-07T02:57:42Z
dc.descriptionWe have studied the electronic structure of epitaxially grown thin films of La$_{1-x}$Sr$_x$FeO$_3$ by {\it in-situ} photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS) measurements. The Fe 2$p$ and valence-band PES spectra and the O $1s$ XAS spectra of LaFeO$_3$ have been successfully reproduced by configuration-interaction cluster-model calculation and, except for the satellite structure, by band-structure calculation.From the shift of the binding energies of core levels, the chemical potential was found to be shifted downward as $x$ was increased. Among the three peaks in the valence-band spectra of La$_{1-x}$Sr$_x$FeO$_3$, the peak nearest to the Fermi level ($E_F$), due to the ``$e_{g}$ band'', was found to move toward $E_F$ and became weaker as $x$ was increased, whereas the intensity of the peak just above $E_F$ in the O $1s$ XAS spectra increased with $x$. The gap or pseudogap at $E_F$ was seen for all values of $x$. These results indicate that changes in the spectral line shape around $E_F$ are dominated by spectral weight transfer from below to above $E_F$ across the gap and are therefore highly non-rigid-band-like.
dc.description8 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0404435
dc.identifierhttp://arxiv.org/abs/cond-mat/0404435
dc.identifierPhys. Rev. B 71, 035108 (2005)
dc.identifierdoi:10.1103/PhysRevB.71.035108
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23770
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleHole-doping-induced changes in the electronic structure of La$_{1-x}$Sr$_x$FeO$_3$ : soft x-ray photoemission and absorption study of epitaxial thin films
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