NDLI: Phonon considerations in the reduction of thermal conductivity in phononic crystals

Content Provider	Springer Nature Link
Author	Hopkins, P. E. Phinney, L. M. Rakich, P. T. Olsson, R. H. El Kady, I.
Copyright Year	2010
Abstract	Periodic porous structures offer unique material solutions to thermoelectric applications. With recent interest in phonon band gap engineering, these periodic structures can result in reduction of the phonon thermal conductivity due to coherent destruction of phonon modes characteristic in phononic crystals. In this paper, we numerically study phonon transport in periodic porous silicon phononic crystal structures. We develop a model for the thermal conductivity of phononic crystal that accounts for both coherent and incoherent phonon effects, and show that the phonon thermal conductivity is reduced to less than 4% of the bulk value for Si at room temperature. This has substantial impact on thermoelectric applications, where the efficiency of thermoelectric materials is inversely proportional to the thermal conductivity.
Starting Page	575
Ending Page	579
Page Count	5
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	103
Issue Number	3
e-ISSN	14320630
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-12-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Operating Procedures, Materials Treatment Characterization and Evaluation of Materials Surfaces and Interfaces, Thin Films Nanotechnology Optical and Electronic Materials Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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