Title: Validation of the Wiedemann-Franz Law in solid and molten tungsten above 2000 K through thermal conductivity measurements via steady state temperature differential radiometry Show Chinese title

Title: 通过稳态温度差辐射测温法在2000 K以上的固态和熔融钨中验证维德曼-弗兰兹定律

Abstract: We measure the thermal conductivity of solid and molten tungsten using Steady State Temperature Differential Radiometry. We demonstrate that the thermal conductivity can be well described by application of Wiedemann-Franz Law to electrical resistivity data, thus suggesting the validity of Wiedemann-Franz Law to capture the electronic thermal conductivity of metals in their molten phase. We further support this conclusion using ab initio molecular dynamics simulations with a machine-learned potential. Our results show that at these high temperatures, the vibrational contribution to thermal conductivity is negligible compared to the electronic component. Show Chinese abstract

Abstract: 我们使用稳态温度差辐射测量法测量固态和熔融钨的热导率。 我们证明，通过将维德曼-弗兰兹定律应用于电电阻率数据，可以很好地描述热导率，从而表明维德曼-弗兰兹定律在捕捉金属熔融相中的电子热导率方面是有效的。 我们进一步利用机器学习势的从头算分子动力学模拟支持这一结论。 我们的结果表明，在这些高温下，振动对热导率的贡献相对于电子成分可以忽略不计。