Thermal rectification and negative differential thermal resistance in lattices with mass gradient
Thermal rectification and negative differential thermal resistance in lattices with mass gradient
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DOI:
10.1103/physrevb.76.020301
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发表时间:
2007-07
影响因子:
3.7
通讯作者:
Nuo Yang;Nianbei Li;Lei Wang;Baowen Li
中科院分区:
文献类型:
--
作者:
Nuo Yang;Nianbei Li;Lei Wang;Baowen Li
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.