Vibrational spectra and thermal rectification in three-dimensional anharmonic lattices

被引：35

作者：

Lan, Jinghua ^{[1
]}

Li, Baowen

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 / 75卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.75.214302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study thermal rectification in a three-dimensional model consisting of two segments of anharmonic lattices. One segment consists of layers of harmonic oscillator arrays coupled to a substrate potential, which is a three-dimensional Frenkel-Kontorova model, and the other segment is a three-dimensional Fermi-Pasta-Ulam model. We study the vibrational bands of the two lattices analytically and numerically, and find that, by choosing the system parameters properly, the rectification can be as high as a few thousands, which is high enough to be observed in experiment. Possible experiments in nanostructures are discussed.

引用

页数：9

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