| 利用晶体的对称性讨论三维晶格振动 |
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| 引用本文： | 龚伦训.利用晶体的对称性讨论三维晶格振动[J].大学物理,1996,15(7):1-3. |
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| 作者姓名： | 龚伦训 |
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| 作者单位： | 贵州师范大学物理系 |
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| 摘 要： | 在晶格动力学中，立方晶格的本征方程的能力学矩阵Ｄ（Ｋ）比较复杂，利用晶体的对称性将Ｄ（Ｋ）化简，由化简后Ｄ（Ｋ）的矩阵形式，能较为容易地解久期方程及确定偏振矢量。
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| 关 键 词： | 晶格振动 久期方程 昌体对称性 |
A DISCUSSION OF THREE-DIMENSIONAL LATTICE VIBRATION IN CRYSTAL BY ITS SYMMETRY |
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| Gong Lunxun.A DISCUSSION OF THREE-DIMENSIONAL LATTICE VIBRATION IN CRYSTAL BY ITS SYMMETRY[J].College Physics,1996,15(7):1-3. |
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| Authors: | Gong Lunxun |
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| Abstract: | The dynamical matrix D(k) of the eigenvalue equation for cubic lattice is usually complex.But it can be simplified and reduced to a simple form by making use of crystal symmetry.Then the corresponding secular equation can be solved more easily and the polarization vector can be determined. |
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| Keywords: | lattice vibration secular equation crystal symmetry |
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