Development of a Novel Low-Temperature Nano-Calorimeter for Low-Dimensional Materials Research and Education

这笔拨款为弗吉尼亚大学用于低维材料研究和教育的新型低温纳米量热计的开发提供支持。这种新仪器有望具有高热容量分辨率，以研究低温下低维几何形状的电子材料。这种新仪器将首次能够在极低温度下探索低维电子系统的热容量行为。热容是最基本的物理性质之一，因为它直接探测热力学量，如熵。然而，低维电子系统在极低温度下的热容几乎是未知的。通过测量各种低维系统在这种未开发状态下的热容，我们的量热计将为研究薄膜样品中的电子和声子密度、磁相互作用和有序以及结构或电子相变开辟新的视野。低维电子系统一直是现代科学技术研究的热点，并将在未来继续发展。由于热容可以提供理解材料性质的基本信息，我们提出的量热计将对当前和未来的材料研究和教育产生重大影响。

This grant provides support for the development of a novel low-temperature nano-calorimeter for low-dimensional materials research and education at the University of Virginia. This new instrument is expected to have a high heat capacity resolution to study electronic materials in a low-dimensional geometry at low temperatures. This new instrument will, for the first time, be able to explore heat capacity behaviors of low-dimensional electronic systems at extremely low temperatures. Heat capacity is one of the most fundamental physical properties as it directly probes thermodynamic quantities such as entropy. However, heat capacities of low-dimensional electronic systems have been nearly unexplored at extremely low temperatures. By measuring heat capacities of various low-dimensional systems in this unexplored regime, our calorimeter will open new horizons in studying electron and phonon densities of states, magnetic interactions and ordering, and structural or electronic phase transitions in thin film samples. Low-dimensional electronic systems have been a focus of research on modern science and technology, and will be in the future. As heat capacity would provide essential information on understanding material properties, our proposed calorimeter will have a significant impact on current and future materials research and education.