考虑次近邻作用原子链的热传导研究

运用Ford—Kac—Mazur（FKM）方法和数值模拟对考虑次近邻作用的一维介电原子链进行了研究。在一定的条件下得到了热流的具体表达式，给出了不同条件下热流随体系大小的变化趋势，分析了次近邻相互作用和质量梯度对热流的影响。结果表明次近邻作用对于热流的调节不明显，而构建材料的不对称结构（质量梯度调节）可作为热传导控制的有效手段。

Study of thermal conduction of atomic chain with the second nearest neighbor interaction

The process of heat conduction in one - dimensional dielectric chains with the second nearest neighbor interaction were studied by the means of Ford - Kae - Mazur（ FKM ） and numerical simulation. We obtained the specific expression of heat current under the eertain eonditions. By numerical simulatiofl, we get.the pieture of heat current verse tO system size under dif- ferent eonditions~ Analyzed the affects of heat current by seeond nearest neighbor interaction and mass gradient. It is shown that the role of second nearest neighbor interaction for heat conduction is not obvious. And build asymmetrie structural materials （ mass gradients adjustment） can be used as an effective means of controlling thermal conductivity.