Abbreviated Journal Title
Appl. Phys. Lett.
Keywords
CONDUCTIVITY; SIMULATION; GLASSES; SOLIDS; Physics, Applied
Abstract
Using vibrational mode analysis, we demonstrate that lattice vibrations in small grain (less than or similar to 3 nm) structurally inhomogeneous nanocrystalline silicon are almost identical to those in homogeneous amorphous structures with the majority of the vibrations delocalized and unpolarized. As a consequence the principal thermal conductivity mechanism in such a nanocrystalline material is the same as in the amorphous material. With increasing grain size the ability of vibrations to homogenize over the nanocrystalline structure is gradually lost and the phonon spectrum becomes progressively more like that of a crystalline material; this is reflected in a crossover in the mechanism of thermal transport.
Journal Title
Applied Physics Letters
Volume
88
Issue/Number
14
Publication Date
1-1-2006
Document Type
Article
DOI Link
Language
English
First Page
3
WOS Identifier
ISSN
0003-6951
Recommended Citation
Bodapatil, Arun; Keblinski, Pawel; Schelling, Patrick K.; and Philpot, Simon R., "Crossover in thermal transport mechanism in nanocrystalline silicon" (2006). Faculty Bibliography 2000s. 5965.
https://stars.library.ucf.edu/facultybib2000/5965
Comments
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