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arXiv 2012.04363cond-mat.mtrl-sci
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graphene-C3B结热整流中声子模贡献的分子动力学研究

Phonon modes contribution in thermal rectification in graphene-C3B junction: A molecular dynamics study

Leila Kiani, Javad Hasanzadeh, Farrokh Yousefi

摘要:

在这项工作中,使用非平衡分子动力学模拟,我们实现了一系列的模拟下,积极和消极的温度梯度,以研究在石墨烯C3 B结GCB的热整流。得到了热整流对冷热浴温差的依赖关系。我们在这里提出的重要量是在热整流的面内和面外声子模的贡献。我们看到Y模式具有高的正热整流,而X和Z模式具有小的负热整流。结果表明,Y模在热整流中起主要作用。此外,还利用声子态密度DOS研究了导致热整流的机制以及界面处的Kapitza电阻。

英文摘要:

In this work using non-equilibrium molecular dynamics simulation we implement a series of simulation under positive and negative temperature gradient in order to investigate the thermal rectification in the graphene C3B junction GCB. The dependence of thermal rectification on temperature difference between the hot and the cold baths is obtained. The important quantity that we present here is the inplanes and out of plane phonon modes contribution in the thermal rectification. We see that the Y mode has high and positive thermal rectification while that the X and Z modes have small and negative thermal rectifications. Thermal rectification for Y mode increases sharply beyond T 30 K to 150 but for X and Z modes decrease slowly by increasing T Our results show that Y mode has major role in the thermal rectification Moreover the underlying mechanisms that leads to the thermal rectification and also Kapitza resistance at the interface are studied via the phonon density of states DOS

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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