两种边界条件的氯化钠结构晶格振动  

Lattice Vibration of NaCl Structure in Two Boundary Conditions

作　　者：钟小丽[1] 李智强[1] 李景德[1] 陆夏莲[1] 

机构地区：[1]中山大学物理学系

出　　处：《中山大学学报（自然科学版）》1999年第3期30-33,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：中山大学科研基金

摘　　要：比较了自由和循环边界条件下氯化钠结构晶格振动计算结果．除平移模外２种条件下其余的模和频率均完全不同．当晶格中２种原子的质量比增大时，自由边界条件下的频谱分布出现２个禁区；The theoretical results of lattice vibration for NaCl structure in free and cyclic boundary conditions are compared.With the exception of translation mode,all modes and frequencies are different in two boundary conditions.When the masses of two atoms in the lattice are very different,there are two forbidden gaps in the spectrum for free boundary condition.In this case,it is impossible to distinguish between optical and acoustic branch in free boundary condition.

关 键 词：晶格振动 氯化钠结构型 自由边界条件 晶格振动 

分 类 号：O614.112[理学—无机化学] O481.2[理学—化学]