Observation of a two level thermal conductivity in the low-dimensional materials

The recent theoretical one-dimensional models display invariably anomalous thermal conductivity. Thermal conductivity of several low-dimensional crystalline systems has been investigated using our new techniques. The results show that for most of the measured materials in the high temperature range...

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Bibliographic Details
Published in:Solid state communications 2010-08, Vol.150 (29), p.1299-1302
Main Authors: Zawilski, B.M., Littleton IV, R.T., Lowhorn, N.D., Tritt, T.M.
Format: Article
Language:English
Subjects:
A. Low-dimensional materials
Condensed Matter
Condensed matter: structure, mechanical and thermal properties
Crystal structure
D. Thermal conductivity
Discontinuity
E. DMA
E. PTC
Exact sciences and technology
Extreme values
Heat transfer
Materials Science
Nonelectronic thermal conduction and heat-pulse propagation in solids
thermal waves
Physics
Solid state
Spikes
Thermal conductivity
Transport properties of condensed matter (nonelectronic)
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Summary:The recent theoretical one-dimensional models display invariably anomalous thermal conductivity. Thermal conductivity of several low-dimensional crystalline systems has been investigated using our new techniques. The results show that for most of the measured materials in the high temperature range the thermal conductivity is composed of two extremes: a low- and a high-conductive state. The effective thermal conductivity jumps abruptly between these two states giving rise to apparent discontinuities or “spikes”.
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2010.05.014