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Light-induced metal-insulator transition in a switchable mirror

Hoekstra, A. F. Th. and Roy, A. S. and Rosenbaum, T. F. and Griessen, R. and Wijngaarden, R. J. and Koeman, N. J. (2001) Light-induced metal-insulator transition in a switchable mirror. Physical Review Letters, 86 (23). pp. 5349-5352. ISSN 0031-9007. doi:10.1103/PhysRevLett.86.5349.

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Rare earth hydride films can be converted reversibly from metallic mirrors to insulating windows simply by changing the surrounding hydrogen gas pressure at room temperature. 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 offers an attractive possibility to tune yttrium hydride through the T = 0 metal-insulator transition. Conductivity and Hall measurements are used to determine critical exponents. The unusually large value for the product of the static and dynamical critical exponents appears to signify the important role played by electron-electron interactions.

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Additional Information:© 2001 The American Physical Society. (Received 13 July 2000) We are grateful to S. R. Nagel for helpful discussions. The work at the University of Chicago was supported by NSF DMR-9801824. A. H. wishes to thank the Dutch Stichting voor Fundamenteel Onderzoek der Materie (FOM) for financial support.
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Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
Issue or Number:23
Classification Code:PACS numbers: 71.30.+h, 71.27.+a, 72.15.–v, 73.50.–h
Record Number:CaltechAUTHORS:20140707-163031158
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46969
Deposited By: George Porter
Deposited On:11 Jul 2014 17:05
Last Modified:10 Nov 2021 17:32

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