Hot Topic: Quantum Design of Phononic Heat Filters

热管理对可持续能源、电子、防护设备和节能建筑的许多技术至关重要。声子是代表行进振动的量子粒子，负责固体中热量的传输。本项目将研究嵌入纳米粒子作为声子过滤器的固体中声子传输的新机制。中子光谱学提供了一种测量声子密度的工具，这对于建立热边界阻力的数学模型至关重要。这有望确定超低导热率的机制，从而在热电发电机和耐热材料中获得潜在的应用。

Heat management is critical to many technologies for sustainable energy, electronics, protective equipment and energy-efficient buildings. The phonon is the quantum particle representing a travelling vibration and is responsible for the transmission of heat in solids. This project will study the new mechanisms for phonon transport in solids modified with embedded nanoparticles, which operate as phononic filters. Neutron spectroscopy provides a tool to measure the phonon density of states which is critical for developing a mathematical model of thermal boundary resistance. This is expected to identify mechanisms for ultra-low thermal conductivity leading to potential applications in thermoelectric generators and heat-resistant materials.