Thermal rectification and negative differential thermal resistance in lattices with mass gradient

被引：265
作者：
Yang, Nuo
Li, Nianbei
Wang, Lei
Li, Baowen [1 ]
机构：
[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore
[2] Natl Univ Singapore, Ctr Computat Sci & Engn, Singapore 117542, Singapore
[3] NUS, Grad Sch Integrat Sci & Engn, Singapore 117597, Singapore
来源：
PHYSICAL REVIEW B | 2007年 / 76卷 / 02期
关键词：
GRADED METALLIC-FILMS; OPTICAL NONLINEARITY; STATE;
D O I：
10.1103/PhysRevB.76.020301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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