Electronic Structure of Lanthanum Hydrides with Switchable Optical Properties

Details Electronic Structure of Lanthanum Hydrides with Switchable Optical Properties Electronic Structure of Lanthanum Hydrides with Switchable Optical Properties

1996-09-09

arxiv.org/abs/cond-mat/9609084v1

Physics

Condensed Matter

plain tex, 3 figures

Scientific paper

10.1103/PhysRevLett.78.1311

Recent dramatic changes in the optical properties of LaH_{2+x} and YH_{2+x} films discovered by Huiberts et al. suggest their electronic structure is described best by a local model. Electron correlation is important in H^- -centers and in explaining the transparent insulating behavior of LaH_3. The metal-insulator transition at $x\sim 0.8$ takes place in a band of highly localized states centered on the $H$-vacancies in the LaH_3 structure.

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