ON THE THEORY OF THE CAUCHY'S RELATION FOR THE ALKALI HALIDE CRYSTALS

Abstract

摘要 本文在二级微扰的近似下,具体导出一个离子在其它离子(看作是点电荷)的晶体场中作用能的一般表达式,写出晶体的能密度函数,从而导出硷金属卤化物离子晶体的各弹性系数的表达式,对于科希关系式的偏离作了数值计算,并与实验结果进行比较。 Abstract In this article, the second order perturbation energy for an ion in the crystal field due to all other ions, each being regarded as a point charge, is given as follows Considering this energy in the investigation on the elasticity theory of the alkali halide cry stals by the use of Born and Haung's method, we obtain the deviation of the Cauchy's relation in the following form As an illustration, the numerical values of the deviation are calculated and we conclude that the contribution of the quadrapole term of the second order perturbation energy to the deviation of the Cauchy's relation can not be neglected. 作者及机构信息 孙家锺, 蒋栋成, 周木易 1. 吉林大学 Authors and contacts SUN CHIA-CHUNG, CHAING TUNG-CHEN, CHOU MO-YI 1. 吉林大学 参考文献 [1] 施引文献