Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund's rule coupling and possible plasmonic sideband

H. Wadati, J. Mravlje, K. Yoshimatsu, H. Kumigashira, M. Oshima, Takeharu Sugiyama, E. Ikenaga, A. Fujimori, A. Georges, A. Radetinac, K. S. Takahashi, M. Kawasaki, Y. Tokura

研究成果: ジャーナルへの寄稿記事

13 引用 (Scopus)

抄録

We investigate the electronic structure of a perovskite-type Pauli paramagnet SrMoO3 (t2g2) thin film using hard x-ray photoemission spectroscopy and compare the results to realistic calculations that combine density functional theory within the local-density approximation (LDA) with dynamical mean-field theory (DMFT). Despite the clear signature of electron correlations in the electronic specific heat, the narrowing of the quasiparticle bands is not observed in the photoemission spectrum. This is explained in terms of the characteristic effect of Hund's rule coupling for partially filled t2g bands, which induces strong quasiparticle renormalization already for values of Hubbard interaction which are smaller than the bandwidth. This interpretation is supported by DMFT model calculations including Hund's rule coupling, which show a renormalization of low-energy quasiparticles without affecting the overall bandwidth. The photoemission spectra show additional spectral weight around -2.5 eV that is not present in the LDA+DMFT results, pointing to a source of correlations that is not present in our calculations that include only on-site interactions. We interpret this weight as a plasmon satellite, which is supported by the measured core-level spectra that all show satellites at this energy.

元の言語英語
記事番号205131
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
90
発行部数20
DOI
出版物ステータス出版済み - 11 20 2014

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Mean field theory
Photoemission
sidebands
Local density approximation
photoelectric emission
electronics
Satellites
bandwidth
Bandwidth
Electron correlations
Core levels
Photoelectron spectroscopy
approximation
Perovskite
Specific heat
Electronic structure
Density functional theory
signatures
specific heat
interactions

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

Photoemission and DMFT study of electronic correlations in SrMoO3 : Effects of Hund's rule coupling and possible plasmonic sideband. / Wadati, H.; Mravlje, J.; Yoshimatsu, K.; Kumigashira, H.; Oshima, M.; Sugiyama, Takeharu; Ikenaga, E.; Fujimori, A.; Georges, A.; Radetinac, A.; Takahashi, K. S.; Kawasaki, M.; Tokura, Y.

:: Physical Review B - Condensed Matter and Materials Physics, 巻 90, 番号 20, 205131, 20.11.2014.

研究成果: ジャーナルへの寄稿記事

Wadati, H, Mravlje, J, Yoshimatsu, K, Kumigashira, H, Oshima, M, Sugiyama, T, Ikenaga, E, Fujimori, A, Georges, A, Radetinac, A, Takahashi, KS, Kawasaki, M & Tokura, Y 2014, 'Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund's rule coupling and possible plasmonic sideband', Physical Review B - Condensed Matter and Materials Physics, 巻. 90, 番号 20, 205131. https://doi.org/10.1103/PhysRevB.90.205131
Wadati, H. ; Mravlje, J. ; Yoshimatsu, K. ; Kumigashira, H. ; Oshima, M. ; Sugiyama, Takeharu ; Ikenaga, E. ; Fujimori, A. ; Georges, A. ; Radetinac, A. ; Takahashi, K. S. ; Kawasaki, M. ; Tokura, Y. / Photoemission and DMFT study of electronic correlations in SrMoO3 : Effects of Hund's rule coupling and possible plasmonic sideband. :: Physical Review B - Condensed Matter and Materials Physics. 2014 ; 巻 90, 番号 20.
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AU - Wadati, H.

AU - Mravlje, J.

AU - Yoshimatsu, K.

AU - Kumigashira, H.

AU - Oshima, M.

AU - Sugiyama, Takeharu

AU - Ikenaga, E.

AU - Fujimori, A.

AU - Georges, A.

AU - Radetinac, A.

AU - Takahashi, K. S.

AU - Kawasaki, M.

AU - Tokura, Y.

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