Heat conduction in a two-dimensional harmonic crystal with disorder

被引:32
作者
Lee, LW [1 ]
Dhar, A
机构
[1] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA
[2] Raman Res Inst, Bangalore 560080, Karnataka, India
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevLett.95.094302
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the problem of heat conduction in a mass-disordered two-dimensional harmonic crystal. Using two different stochastic heat baths, we perform simulations to determine the system size (L) dependence of the heat current (J). For white noise heat baths we find that J similar to 1/L-alpha with alpha approximate to 0.59, while correlated noise heat baths give alpha approximate to 0.51. A special case with correlated disorder is studied analytically and gives alpha=3/2, which agrees also with results from exact numerics.
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页数:4
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