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Wilkinson, M.
(2011).
DOI: https://doi.org/10.1209/0295-5075/96/67007
Abstract
Experiments often show that the photoconductance σ of a semiconductor system and the light intensity I are related by σ~Iγ. Conventional theories give a satisfactory explanation for γ=1 or γ=1/2, but anamalous exponents close to γ=3/4 are often observed. This paper argues that there is a universal anomalous regime for which γ=3/4 (or γ=2/3 in two dimensions), resulting from the kinetics of electron-hole recombination being controlled by Coulombic attraction. Because the local electric fields are extremely high, the theory uses the "hot-carrier" model for transport.
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About
- Item ORO ID
- 30916
- Item Type
- Journal Item
- ISSN
- 1286-4854
- Keywords
- Condensed matter; electrical, magnetic and optical; semiconductors; photoconduction and photovoltaic effects
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Mathematics and Statistics
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2011 EPLA
- Depositing User
- Michael Wilkinson