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arXiv · 1201.4456

Self-Energy Effects on the Low- to High-Energy Electronic Structure of SrVO3

S. Aizaki·T. Yoshida·K. Yoshimatsu·M. Takizawa·M. Minohara·S. Ideta·A. Fujimori·K. Gupta·P. Mahadevan·K. Horiba·H. Kumigashira·M. Oshima
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Abstract

The correlated electronic structure of SrVO3 has been investigated by angle-resolved photoemission spectroscopy using in-situ prepared thin films. Pronounced features of band renormalization have been observed: a sharp kink ~60 meV below the Fermi level (EF) and a broad so-called "high-energy kink" ~0.3 eV below EF as in the high-Tc cuprates although SrVO3 does not show magnetic fluctuations. We have deduced the self-energy in a wide energy range by applying the Kramers-Kronig relation to the observed spectra. The obtained self-energy clearly shows a large energy scale of ~0.7 eV which is attributed to electron-electron interaction and gives rise to the ~0.3 eV "kink" in the band dispersion as well as the incoherent peak ~1.5eV below EF. The present analysis enables us to obtain consistent picture both for the incoherent spectra and the band renormalization.

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S. Aizaki, T. Yoshida, K. Yoshimatsu, M. Takizawa, M. Minohara, S. Ideta, A. Fujimori, K. Gupta, P. Mahadevan, K. Horiba, H. Kumigashira, M. Oshima. 2012-01-21. Self-Energy Effects on the Low- to High-Energy Electronic Structure of SrVO3. https://doi.org/10.1103/physrevlett.109.056401

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