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
期刊:
影响因子:
3.7
通讯作者:
Nuo Yang;Nianbei Li;Lei Wang;Baowen Li
Nuo Yang;Nianbei Li;Lei Wang;Baowen Li
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Nuo Yang;Nianbei Li;Lei Wang;Baowen Li

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我们研究了具有质量梯度的一维(1D)谐和非谐晶格的热性质。研究发现,由于梯度子的存在,一维谐晶格中存在一个质量梯度,从而形成温度梯度。具有质量梯度的非简谐晶格中的热流是不对称的。此外,在一定的温度范围内,观察到了负差分热阻。讨论了这种梯度材料在热整流和热敏晶体管中的可能应用。
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.