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- W2012469297 abstract "In this paper, we present photoemission experiments on the hole doped Haldane chain compound $Y_{2-x}Sr_xBaNiO_5$. By using the photon energy dependence of the photoemission cross section, we identified the symmetry of the first ionisation states (d type). Hole doping in this system leads to a significant increase in the spectral weight at the top of the valence band without any change in the vicinity of the Fermi energy. This behavior, not observed in other charge transfer oxides at low doping level, could result from the inhomogeneous character of the doped system and from a Ni 3d-O 2p hybridization enhancement due to the shortening of the relevant Ni-O distance in the localized hole-doped regions." @default.
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- W2012469297 date "2003-03-21" @default.
- W2012469297 modified "2023-10-18" @default.
- W2012469297 title "Anomalous spectral weight in photoemission spectra of the hole-doped Haldane chainY2−xSrxBaNiO5" @default.
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- W2012469297 doi "https://doi.org/10.1103/physrevb.67.125118" @default.
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