CAJ | 학술논문

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。
채용선성화양자류체동역학모형，연구료대전입자평행우이유전자기평면운동시집체격발정황，득출상호작용과정중전자기류체적속도장시량、입사입자소수적조지력、측향력화자능적표체식。결과표명，당입사입자재이유전자기부근운동시，전자기류체내산생V형진탕적미류병이종파적형식향입사입자운동적반방향전파。차외，전자기류체내적마찰력대입사입자적능량손실등재불동속도구역내회산생일정적영향。
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.