24 research outputs found

    Electronic Structure of Lanthanum Hydrides with Switchable Optical Properties

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    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∼0.8x\sim 0.8 takes place in a band of highly localized states centered on the HH-vacancies in the LaH_3 structure.Comment: plain tex, 3 figure
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