带电粒子与二维电子气相互作用的理论研究  

Theoretical Study on Interaction of Charged Particle with Two Dimensional Electron Gases

作　　者：李春芝[1] 菅阳阳 何颖卓[1] 

机构地区：[1]内蒙古民族大学物理与电子信息学院,内蒙古通辽028043

出　　处：《内蒙古民族大学学报（自然科学版）》2014年第1期1-3,共3页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：国家自然科学基金资助项目(11005058);内蒙古民族大学科研创新团队项目;内蒙古民族大学博士科研启动基金资助项目(BS240)

摘　　要：采用线性化量子流体动力学模型,研究了带电粒子平行于二维电子气平面运动时集体激发情况,得出相互作用过程中电子气流体的速度场矢量、入射粒子所受的阻止力、侧向力和自能的表达式.结果表明,当入射粒子在二维电子气附近运动时,电子气流体内产生V型振荡的尾流并以纵波的形式向入射粒子运动的反方向传播.此外,电子气流体内的摩擦力对入射粒子的能量损失等在不同速度区域内会产生一定的影响.The collective excitations of electrons induced by an external incident charged particle moving parallel to a Two-Dimensional Electron Gases（2DEG）is investigated by using linearized quantum hydrodynamic（QHD）theory. General expressions of the velocity vector of perturbed electron gases and the stopping force,lateral force,self-energy of the charged particle are derived. The result shows that a V-shape oscillatory wake occurs to the elctron gases and propagates opposite to the direction of particle motion in compressional wave when the particle moved closed to the electron gases plane. Further,the frictional force in electron gases will influnce the energy force,lateral force and self-energy in lower and higher speed in some degree.

关 键 词：量子流体动力学模型 二维电子气 尾流效应 能量损失 

分 类 号：O35[理学—流体力学]