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On the electronic structure of the light rare earth hydrides

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Zeitschrift für Physik B Condensed Matter

Abstract

Photoemission (XPS, HeI) and inverse photoemission (hv=9.7 eV) data on Y, La, Ce, Pr and their hydrides are presented. The discussion focusses on the ground state electronic properties of the hydrides and in particular on the empty density of states. In addition the correlation effects which appear in these experimental techniques in the presentce of well localized, partly filled 4f states are stressed. Hybridization is displayed in three typical situations:a) The very existence of a weak 4f-conduction band mixing allows electronic transitions into 4f derived states to be observed by low energy BIS, although the cross section is exceedingly small at this energy-b) 3d core excitation pulls the empty 4f levels close to the hydrogen ligand levels such that they become strongly mixed and the screening level is markedly split-c) A schematic relation is found between core level shifts upon hydriding, charge transfer and the position of the hydrogen induced band, simply by considering the mixing of hydrogen ligand states with metald states.

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Authors and Affiliations

  1. Laboratorium für Festkörperphysik, ETH, Zürich, Switzerland

    J. Osterwalder

  2. Department of Chemistry, University of Hawaii, 96822, Honolulu, HI, USA

    J. Osterwalder

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Osterwalder, J. On the electronic structure of the light rare earth hydrides. Z. Physik B - Condensed Matter 61, 113–128 (1985). https://doi.org/10.1007/BF01307765

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  • DOI: https://doi.org/10.1007/BF01307765

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