Evidence for strong electronic correlations in the spectra of Sr$_2$RuO$_4$

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dc.creatorPchelkina, Z. V.
dc.creatorNekrasov, I. A.
dc.creatorPruschke, Th.
dc.creatorSekiyama, A.
dc.creatorSuga, S.
dc.creatorAnisimov, V. I.
dc.creatorVollhardt, D.
dc.date2006-01-23
dc.date.accessioned2026-07-07T07:41:36Z
dc.date.available2026-07-07T07:41:36Z
dc.descriptionThe importance of electronic correlation effects in the layered perovskite Sr$_2$RuO$_4$ is evidenced. To this end we use state-of-the-art LDA+DMFT (Local Density Approximation + Dynamical Mean-Field Theory) in the basis of Wannier functions to compute spectral functions and the quasiparticle dispersion of Sr$_2$RuO$_4$. The spectra are found to be in good agreement with various spectroscopic experiments. We also calculate the $\textbf{k}$-dependence of the quasiparticle bands and compare the results with new angle resolved photoemission (ARPES) data. Two typical manifestations of strong Coulomb correlations are revealed: (i) the calculated quasiparticle mass enhancement of $m^*/m \approx2.5$ agrees with various experimental results, and (ii) the satellite structure at about 3 eV binding energy observed in photoemission experiments is shown to be the lower Hubbard band. For these reasons Sr$_2$RuO$_4$ is identified as a strongly correlated 4$d$ electron material.
dc.description14 pages, 11 figures, 1 table
dc.identifierhttps://arxiv.org/abs/cond-mat/0601507
dc.identifierhttp://arxiv.org/abs/cond-mat/0601507
dc.identifierPhys. Rev. B 75, 035122 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.035122
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122174
dc.subjectStrongly Correlated Electrons
dc.titleEvidence for strong electronic correlations in the spectra of Sr$_2$RuO$_4$
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