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Ultraviolet triggered switchable mirrors

Rosenbaum, Thomas F. and Hoekstra, Allard F. T. (2002) Ultraviolet triggered switchable mirrors. Advanced Materials, 14 (3). pp. 247-250. ISSN 0935-9648.

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Trivalent rare earth hydrides stabilized in thin film form demonstrate spectacular optical and electronic properties. A thin film of YH_x or LaH_x can be transformed rapidly from metal to insulator, from shiny mirror to transparent window, simply by changing the surrounding hydrogen gas pressure or an electrolytic cell potential at room temperature (RT). At low temperatures, in-situ doping is not possible in this way as hydrogen cannot diffuse. However, our finding of persistent photoconductivity under ultraviolet illumination permits tuning through the T = 0 metal–insulator transition and reveals the important role played by strong electron correlations. We discuss the optical, electronic, magnetic, and structural properties of switchable mirrors from both the technological and scientific perspectives.

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URLURL TypeDescription<247::AID-ADMA247>3.0.CO;2-#DOIArticle;2-%23/abstractPublisherArticle
Additional Information:© 2002 WILEY-VCH. We are indebted to R. Griessen for inspiring this work and to A. Roy, N. Koeman, and R. Wijngaarden for their invaluable help. The photographs of Figures 1 and 4 and Figure 2 appear by courtesy of R. Griessen and Philips, respectively. The experiments at the University of Chicago were supported by the National Science Foundation under Grant No. DMR-0114798.
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Subject Keywords:Doping hydrogen; Phase transitions metal-insulator; Switchable mirrors
Issue or Number:3
Record Number:CaltechAUTHORS:20140707-163030567
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Official Citation:Rosenbaum, T.F. and Hoekstra, A.F.T. (2002), Ultraviolet Triggered Switchable Mirrors. Adv. Mater., 14: 247–250. doi: 10.1002/1521-4095(20020205)14:3<247::AID-ADMA247>3.0.CO;2-#
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46965
Deposited By: George Porter
Deposited On:09 Jul 2014 15:34
Last Modified:03 Oct 2019 06:48

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