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Electronic Structure of the YH3 Phase from Angle-Resolved Photoemission Spectroscopy

J. Hayoz, C. Koitzsch, M. Bovet, D. Naumovic, L. Schlapbach, P. Aebi

cond-mat.mtrl-sciarXiv:cond-mat/0207680

Abstract

Yttrium can be loaded with hydrogen up to high concentrations causing dramatic structural and electronic changes of the host lattice. We report on angle-resolved photoemission experiments of the Y trihydride phase. Most importantly, we find the absence of metal d-bands at the Fermi level and a set of flat, H-induced bands located at much higher binding energy than predicted, indicating an increased electron affinity at H sites.

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