一、引言 固体中原子间相互作用使原子围绕平衡位置振动并形成各种模式的波,Debye从连续介质中的弹性波考虑分析了晶格振动的能量,从而得到了固体比热的公式。Debye理论中的特征温度——Debye温度θ_D是标志固体中原子间结合强弱的物理量,对研究晶格动力学是有意义的。一般可以从两个方法求θ_D:1)测定固体比热随温度变化的规律,按Debye比热 I. INTRODUCTION The interactions between atoms in a solid make the atoms vibrate around the equilibrium position and form various modes of wave. Debye analyzes the energy of the lattice vibration from the elastic waves in the continuum and obtains the formula for the specific heat of the solid. The characteristic temperature in Debye theory, Debye temperature, θ_D, is a physical quantity that indicates the strength of binding between atoms in a solid and is meaningful for studying the lattice dynamics. Generally can be obtained from the two methods θ_D: 1) Determination of solid specific heat with temperature changes according to Debye specific heat