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Author Witanachchi, S. ♦ Hyde, R. ♦ Beekman, M. ♦ Mukherjee, D. ♦ Mukherjee, P. ♦ Nolas, G.S.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2006
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Transistors ♦ Solid state circuits ♦ Power conversion ♦ Laser ablation ♦ Pulsed laser deposition ♦ Semiconductor lasers ♦ Optical pulse generation ♦ Semiconductor films ♦ Optical pulses ♦ Optical materials
Abstract Thin films of the type I clathrate $Ba_{8}Ga_{16}Ge$ $_{30}$ have been synthesized by the pulsed laser ablation technique. The relatively low ablation threshold of this material at the UV wavelength leads to the ejection of particulates during laser-target interaction. The optimum laser fluence for the formation of stoichiometric films with the lowest particle density was 2.5 J/cm2 . Excitation of the UV laser generated plasma by a second pulsed $CO_{2}$ laser further reduced particulate ejection and produced broader expansion profiles leading to large area uniform films. Films deposited by this method on quartz substrates were polycrystalline and showed semiconducting behavior. High purity type II $Na_{x}Si_{136}$ clathrates in bulk form have been synthesized by solid state reactions. The electrical properties of Na $_{x}Si_{136}$ (0 < x < 24) clathrates show a clear dependence on Na content, with resistivities that span several orders of magnitude
Description Author affiliation: Dept. of Phys., South Florida Univ., Tampa, FL (Witanachchi, S.; Hyde, R.; Beekman, M.; Mukherjee, D.; Mukherjee, P.; Nolas, G.S.)
ISBN 1424408105
ISSN 10942734
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2006-08-06
Publisher Place Austria
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 1.09 MB
Page Count 4
Starting Page 44
Ending Page 47


Source: IEEE Xplore Digital Library