| 氯化钾晶体声子谱的唯象计算 |
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| 引用本文： | 苏国珍,陈传鸿.氯化钾晶体声子谱的唯象计算[J].厦门大学学报(自然科学版),1989,28(3):261-265. |
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| 作者姓名： | 苏国珍 陈传鸿 |
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| 作者单位： | 厦门大学物理学系，厦门大学物理学系 厦门水产学院基础部教师 |
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| 基金项目： | 中国科学院自然科学基金资助课题 |
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| 摘 要： | 在合理的近似下,通过拟合实验弹性系数的唯象方法确定了氯化钾晶体的最近邻与次近邻力常数,进而求得其声子谱。计算时计入长程的库仑作用和多体修正,结果与实验符合良好。这种方法还可用于其它碱金属卤化物声子谱的计算。
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| 关 键 词： | ■化钾晶体 力■数 声子谱 |
Phenomenological Calculations of Phonon Dispersions for KC1 Crystal |
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| Su Guozhen Chen Chuanhong.Phenomenological Calculations of Phonon Dispersions for KC1 Crystal[J].Journal of Xiamen University(Natural Science),1989,28(3):261-265. |
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| Authors: | Su Guozhen Chen Chuanhong |
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| Abstract: | Under reasonable approximations, the force constants of the first and second nearest neighbours for KC1 crystal are determined by fitting experimental elastic constants. The phonon dispersions are calculated. The results are in good agreement with the experiments on the condition that the Coulombic interactions and many-body corrections are considered. The method can also be used for the calculations of the phonon dispersions of other alkali halides. |
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| Keywords: | KC1 crystal Force constant Phonon dispersion |
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