Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Science, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, People's Republic of China.
Center for Phononics and Thermal Energy Science, China-EU Joint Lab for Nanophononics, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.
J Phys Condens Matter. 2023 Jul 13;35(41). doi: 10.1088/1361-648X/ace412.
Liquid heliums are intriguing substance. Superfluid states below certain critical temperatures, notably liquid helium-4 and helium-3 exhibit ultra-high thermal conductivity ( TC) in the superfluid phase. However, the microscopic origin of the TC of liquid heliums in the normal phase remains unclear. In this work, we employ the thermal resistance network model to calculate the thermal conductivities of normal liquid helium-4 (He I) and helium-3. Predicted values are not only in good agreement with the measurements but also reproduce the experimental trend of TC increasing with temperature and pressure.
液态氦是一种有趣的物质。在某些特定的临界温度以下，处于超流态的氦-4 和氦-3 会表现出超高温导性（TC）。然而，正常相液态氦的 TC 的微观起源仍不清楚。在这项工作中，我们采用热阻网络模型来计算正常液态氦-4（He I）和氦-3 的热导率。预测值不仅与测量值吻合良好，还再现了 TC 随温度和压力升高而升高的实验趋势。
