Thermal conductivity of anharmonic crystals with self-consistent baths: Analytical computation with discrete time

被引:12
|
作者
Pereira, Emmanuel [1 ]
Falcao, Ricardo [2 ]
Lemos, Humberto C. F. [2 ]
机构
[1] Univ Fed Minas Gerais, Dept Fis, Inst Ciencias Exatas, BR-30161970 Belo Horizonte, MG, Brazil
[2] Univ Fed Sao Joao del Rei, Dept Fis & Matemat, BR-36420000 Ouro Branco, MG, Brazil
来源
PHYSICAL REVIEW E | 2013年 / 87卷 / 03期
关键词
FOURIERS LAW; TRANSPORT;
D O I
10.1103/PhysRevE.87.032158
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We analytically compute the thermal conductivity of anharmonic crystals with self-consistent stochastic reservoirs. We develop an integral representation for the heat current, assume the approximation of discrete times, and in a perturbative analysis that is rigorously supported by a convergent cluster expansion compute the thermal conductivity for a chain with quartic anharmonic on-site potential. In the high anharmonicity regime, the result for the dependence of the conductivity on temperature is the same as for the system without inner reservoirs. The presented formalism is quite general and is also valid for inhomogeneous systems in any space dimension. DOI: 10.1103/PhysRevE.87.032158
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页数:5
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