Article
Electronic Structure and Light-Induced Conductivity of a Transparent Refractory Oxide
Physical Review Letters
Abstract
Combined first-principles and experimental investigations reveal the underlying mechanism responsible for a drastic change of the conductivity (by 10 orders of magnitude) following hydrogen annealing and UV irradiation in a transparent oxide, 12CaO · 7Al2O3, found by Hayashi et al. [Nature (London) 419, 462 (2002).] The charge transport associated with photoexcitation of an electron from H- occurs by electron hopping.We identify the atoms participating in the hops, determine the exact paths for the carrier migration, estimate the temperature behavior of the hopping transport, and predict a way to enhance the conductivity by specific doping.
Department(s)
Physics
Keywords and Phrases
- Annealing,
- Carbon Nanotubes,
- Charge Transfer,
- Crystallography,
- Doping (Additives),
- Electric Conductivity,
- Electronic Structure,
- Energy Gap,
- Hydrogen,
- Ion Implantation,
- Sintering,
- Ultraviolet Radiation,
- Band Gap,
- Electron Trapping,
- Hopping,
- Photoexcitation,
- Calcium Compounds
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2004 American Physical Society (APS), All rights reserved.
Publication Date
7-1-2004
Publication Date
01 Jul 2004
Disciplines
Citation Information
Julia E. Medvedeva, Arthur J. Freeman, Mariana I. Bertoni and Thomas O. Mason. "Electronic Structure and Light-Induced Conductivity of a Transparent Refractory Oxide" Physical Review Letters Vol. 93 Iss. 1 (2004) p. 016408-1 - 016408-4 ISSN: 0031-9007 Available at: http://works.bepress.com/julia-medvedeva/53/