碲化铅热力学性质的准谐近似计算

摘要

Based on the qusi-harmonic approximation, the thermodynamic properties of PbTe is calculated. The dependence of heat capacity, Debey temperature, thermal expansion coefficient and the Grüneisen constant on temperature and pressure are discussed, which is useful for further investigation of the lattice thermal conductivity.%本文运用准谐近似计算了碲化铅的热力学函数，得到了定容热容量、德拜温度、热膨胀系数、格林爱森参数随温度以及压强变化的规律，为进一步研究碲化铅的晶格热导率奠定基础。