次近邻近似下具有在位势的一维双原子链中杂质引起的局域振动  

The local vibration mode induced by an impurity in a diatomic linear chain with on-site potential and the secondary neighbor interactions

作　　者：吕岿[1] 童国平[2] 

机构地区：[1]江西上饶师范学院物电学院,江西上饶334001 [2]浙江师范大学数理与信息工程学院,浙江金华321004

出　　处：《大学物理》2017年第11期15-17,72,共4页College Physics

基　　金：国家自然科学基金(11465015)资助

摘　　要：考虑原子间次近邻相互作用,讨论了具有在位势的一维双原子链中杂质引起的局域振动,得到次近邻互作用力、在位势共同作用下局域模的存在条件及振动的基本特征.Considering the secondary neighbor interactions between the atoms in a diatomic linear chain with on-site potential,the lattice vibration equation of the diatomic chain with an impurity is solved,and the basic feature of the effect of on-site potential and the secondary neighbor interaction on the symmetric local vibration are discussed.

关 键 词：杂质 次近邻作用 在位势 局域模 

分 类 号：O481[理学—固体物理]