摘要
超晶格由两种不同晶体材料交替生长的具有周期性结构的多层薄膜构成,两种材料的"势垒—势阱"结构就是量子阱.通过理想的无限深势阱模型,讨论了施加磁场作用的超晶格中单量子阱束缚态的能级结构和态密度,得到了体系的本征能量与本征函数.分析表明,沿超晶格生长方向能级不受外加磁场影响,垂直于超晶格生长方向以ωc为回旋频率的谐振运动,超晶格量子阱量子化能级高度简并,简并度和外加磁场成正比.
Superlattice is constructed by ahemate growth and periodic muhilayer thin films which consists of two different crys- tal materials. The potential barrier-potential trap structure of two kinds of materials is called quantum well. By adopting the ideal methods of the infinite potential well, the structures of the energy levels and the density of bound states of the single quantum well in superlattice with an applied magnetic field are analyzed. The results show that the eigen value and eigen function of the quantum well is acquired, and the action of electron along the direction of superlattice growth is not affected by magnetic field, and vertical the direction of superlattiee growth is harmonic action with frequentcy ω. The energy levels of superlattice quantum well are high degenerate quantization, and the degeneracy increases with increasing magnetic field.
出处
《渭南师范学院学报》
2012年第2期48-51,共4页
Journal of Weinan Normal University
基金
渭南师范学院科研计划项目(11YKF017)
关键词
超晶格
量子阱
态密度
磁场
superlattice
quantum-well
density of bound states
electric field
