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Angle-scanned photoemission on YbH<sub>x</sub>: relevance for switchable mirrors
Auteur(s)
Hayoz, J.
Koitzsch, C.
Popovic, D.
Bovet, M.
Naumovic, D.
Aebi, Philipp
Date de parution
2002
In
Surface Review and Letters (SRL), World Scientific Publishing Company, 2002/9/1/235-241
Résumé
Yttrium, lantanum and rare earth elements can be loaded with hydrogen inducing a metal–insulator transition and giving rise to optical switching from reflecting to transparent. We present angle-scanned photoemission experiments characterizing thin YbH<sub>x</sub> films grown on W(110) at room temperature. Hydrogen loading is performed in an ultrahigh-vacuum-compatible high pressure (1 bar) reaction cell. Via full-hemispherical X-ray photoelectron diffraction and low energy electron diffraction, it is demonstrated that these films grow well-ordered and single-crystalline. Ultraviolet photoemission reveals a gap for the dihydride phase confirming a transition from reflecting to transparent as seen by visual inspection. Ion implantation through additional H+ sputtering allows one to increase the hydrogen content to x ≈ 2.4.
Identifiants
Type de publication
journal article
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