2012年9月
Anomalous optical conductivity in disordered condensed matter
JOURNAL OF NON-CRYSTALLINE SOLIDS
- ,
- ,
- ,
- 巻
- 358
- 号
- 17
- 開始ページ
- 2373
- 終了ページ
- 2376
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jnoncrysol.2011.09.042
- 出版者・発行元
- ELSEVIER SCIENCE BV
The real and imaginary optical conductivities in disordered semiconductors (and metals) do not follow classical Drude's law in the near infrared region. We discuss an origin of the anomalous free carrier absorption in metallic (and near metallic) states of chalcogenide materials (phase-change GST), dye-sensitized nanocrystalline TiO2 and nanocrystalline silicon films. A series sequence of "localized" and "extended" state type behavior of carriers produces a Lorentz-type resonance which is caused by "bound" (localized) electrons. The analytical expressions were fit to the experimental data and produced various important physical parameters such as the numbers of free and localized carriers, the scattering time of free carriers, tunneling time of localized carriers, and the Drude dc conductivity in the system. We also discuss whether the present model has generated reasonable physical parameters. (C) 2011 Elsevier B.V. All rights reserved.
- リンク情報
-
- DOI
- https://doi.org/10.1016/j.jnoncrysol.2011.09.042
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000310394700106&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84865725773&origin=inward
- ID情報
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- DOI : 10.1016/j.jnoncrysol.2011.09.042
- ISSN : 0022-3093
- Web of Science ID : WOS:000310394700106