混合激励与应变超晶格系统沟道运动的临界特征

The Mixed Excitation and Critical Characteristics of Channeling Motion in Strained Superlattice

摘要:

从势和场的观点出发讨论了带电粒子在应变超晶格中的运动行为.在经典力学框架内和偶极近似下,引入正弦平方势,把粒子运动方程化为具有阻尼项和混合激励项的广义摆方程.利用Melnikov方法讨论了系统的临界性质与混沌行为.结果表明,系统的混沌行为与它的参数有关,适当调节参数,就可以原则上保证系统的稳定性.

Abstract:

From the view of potential and field,the motion behaviors of the charged particles were discussed for the strained superlattice.By introducing the sine-squared potential,the particle motion equation was reduced to generalized pendulum equation with damping term and mixed excitation term in the framework of classical mechanics and dipole approximation.The critical nature and the chaotic behavior of the system were discussed by Melnikov method.The results show that the chaotic behavior of the system relates to its parameters,and the stability of the system can be guaranteed in principle by appropriately adjustmenting the parameters,.