论文标题
通过靶向声子激发调节导热率
Modulating Thermal Conductivity via Targeted Phonon Excitation
论文作者
论文摘要
导热率是许多应用中的关键材料特性，例如与热电设备和散热相关的应用。有效调节热导率已成为热传导领域的一个非常关注的问题。在这项研究中，提出了一种量子策略来通过激发目标的声子调节导热率。结果表明，与3189 w/m-k的固有值相比，石墨烯的热电导率可以定制在1559 w/m-k（49％）至4093 w/m-k（128％）的范围内。对于石墨烯纳米容器，也观察到类似的趋势。结果是通过从头算计算和分子动力学模拟获得的。这种调节热导率的全新量子策略铺平了一种用于量子热传导的方式。
Thermal conductivity is a critical material property in numerous applications, such as those related to thermoelectric devices and heat dissipation. Effectively modulating thermal conductivity has become a great concern in the field of heat conduction. In this study, a quantum strategy is proposed to modulate thermal conductivity by exciting targeted phonons. The results show that the thermal conductivity of graphene can be tailored in the range of 1559 W/m-K (49%) to 4093 W/m-K (128%), compared with the intrinsic value of 3189 W/m-K. A similar trend is also observed for graphene nanoribbons. The results are obtained through both ab initio calculations and molecular dynamics simulations. This brand-new quantum strategy to modulate thermal conductivity paves a way for quantum heat conduction.
