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arXiv · 1107.5920

Hallmark of strong electronic correlations in LaNiO$_3$: photoemission kink and broadening of fully occupied bands

Xiaoyu Deng·Michel Ferrero·Jernej Mravlje·Markus Aichhorn·Antoine Georges
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Abstract

Recent angular-resolved photoemission experiments on LaNiO$_3$ reported a renormalization of the Fermi velocity of $e_g$ quasiparticles, a kink in their dispersion at $ -0.2$ eV and a large broadening and weakened dispersion of the occupied $t_{2g}$ states. We show here that all these features result from electronic correlations and are quantitatively reproduced by calculations combining density-functional theory and dynamical mean-field theory. The importance and general relevance of correlation effects in filled bands coupled by inter-orbital interactions to a partially-filled band are pointed out.

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Xiaoyu Deng, Michel Ferrero, Jernej Mravlje, Markus Aichhorn, Antoine Georges. 2011-07-29. Hallmark of strong electronic correlations in LaNiO$_3$: photoemission kink and broadening of fully occupied bands. https://doi.org/10.1103/physrevb.85.125137

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