Thermal rectification and negative differential thermal resistance in lattices with mass gradient
- 24 July 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 76 (2), 020301
- https://doi.org/10.1103/physrevb.76.020301
Abstract
We study thermal properties of one-dimensional (1D) harmonic and anharmonic lattices with a mass gradient. It is found that a temperature gradient can be built up in the 1D harmonic lattice with a mass gradient due to the existence of gradons. The heat flow is asymmetric in anharmonic lattices with a mass gradient. Moreover, in a certain temperature region, negative differential thermal resistance is observed. Possible applications in constructing thermal rectifiers and thermal transistors by using the graded material are discussed.Keywords
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