| 晶格中电子的有效质量讨论 |
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| 引用本文： | 王爱芬.晶格中电子的有效质量讨论[J].德州学院学报,2005,21(2):40-44. |
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| 作者姓名： | 王爱芬 |
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| 作者单位： | 杭州电子科技大学理学院,浙江杭州,310012 |
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| 摘 要： | 对一般的输运过程问题把电子运动近似当作经典粒子来处理.给出了电子准经典运动的两个基本关系式.定义了有效质量张量,说明它是一个二阶对称张量,讨论了有效质量的物理意义.计算了一维弱周期场情况下的有效质量,有效质量可以是正值,也可以是负值,与电子状态及能带结构有关,在能带极值附近电子可看成具有有效质量的自由电子.
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| 关 键 词： | 有效质量张量 态密度 电子速度 晶体动量 准经典运动 等能面 |
| 文章编号： | 1004-9444(2005)02-0040-05 |
| 修稿时间： | 2004年10月23 |
The Discuss for Effective Mass of Crystal Electron |
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| WANG Ai-fen.The Discuss for Effective Mass of Crystal Electron[J].Journal of Dezhou University,2005,21(2):40-44. |
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| Authors: | WANG Ai-fen |
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| Abstract: | For ordinary transport process , the crystal electron is approximated to quasi - classical particle. The two basic formulas of electron quasi motion are given. The effective - mass tensor is defined and its second - rank symmetry tensor and physical significant are illustrated. The effective - mass of one dimensional weak periodic potential is calculated. The effective mass may be positive or negative , it relates to the state of electron and the energy band structure . The state of electron near by extreme value of the energy band are treated to free electron of effective - mass. |
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| Keywords: | effective - mass tensor density of state electron velocity crystal momentum quasi classical partical constant - energy surface |
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