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In accordance with the effective mass theory, the magnetic Kronig-Penny potential was used to solve the electronic band structure of GaAs/Al?xGa? 1-xAs superlattice in a periodic magnetic field. 在有效质量理论近似下;采用磁Kronig-Penny势场;精确求解了GaAs/AlxGa1-xAs超晶格中的电子在周期性磁场中形成的能带结构.
effective mass theory 有效质量理论
In the framework of effective mass envelope function theory, the electronic states of the InAs/GaAs quantum ring are studied. 摘要在有效质量包络函数理论的框架下，研究了铟砷／镓砷量子环的电子态。
The effective mass m * of the carrier of IMO is about 0 35 m. IMO薄膜的载流子有效质量约为电子静止质量的 0 35倍 ;
It is pointed out that on the basis of the theory given, the positions of the conduction band minima and the anisotropy of the donor effective mass wave function can be precisely determined by the method of ENDOR and its pressure effects. 指出了利用双共振方法及其压力效应有可能测定导带底的波矢及有效质量波函数的各向异性分布。
This paper analyses the physical sence of effective mass of energy band elec-tron and also discusses its tensor. 本文分析了有效质量的物理意义,并对它的张量性质进行了讨论。
The quark mass is defined by quark propagator and from this definition we calculate effective mass of quark. 用夸克传播子定义了夸克的质量，进而讨论了夸克的有效质量。
We have studied analytically the electron effective mass of single-wall carbon nanotubes. 他们发现，在这两个观测结果中，特定波长的位置会随著质子对电子的质量比而改变。
Abstract: The vibration solution of a massive spring system is presented, the effective mass of a spring is derived. The approximate period of the vibration is given. 文摘:给出了弹簧质量不可忽略的弹簧振子系统的振动解，导出了弹簧的有效质量的渐近级数表达式，指出振动呈拟周期性.
It is found that under little axial strain,armchair carbon nanotubes are still conductors,but Fermi wave vector,Fermi dot and the effective mass near Fermi face are changed. 在小的轴向拉伸下,扶手椅型碳纳米管仍然是良好的导体,但其费米波矢、费米点及费米面处的有效质量都发生了变化。
T he influence of the electron-spin on the ground state energy and the effective mass of a strong-coupling magnetopolaron in polar crystals are discussed. 讨论了电子自旋对极性晶体内强耦合极化子基态能量和有效质量的影响。
Temperature dependence of the effective mass of the strong coupling magnetopolaron in polar crystals are studied by means of an improved linear combination operator method. 采用改进的线性组合算符法研究极性晶体中强耦合磁极化子的有效质量与温度的关系。
Key words： reinforced concrete、 concrete、 high performance concrete、 cement concrete、 pozzolanic effect、 mass concrete. 关键词：钢筋混凝土、混凝土、性能混凝土、高强混凝土、泥混凝土、生骨料混凝土、体积混凝土。
That's rather an effective use of color. 这种使用颜色的手法效果相当好。
In this paper, the dispersion of the longitudinal optical phonons is considered in a parabolic approximation. The ground state enery, effective mass and selftrapped energy ef a polaron in a polyatomic crystals are calculated. 本文计及纵光学声子的色散,在抛物近似下,计算了多原子晶体中极化子的基态能量,有效质量和自陷能。
The vibration frequency and effective mass of the strong-coupling polaron in an infinite quantum well were derived by using improved linear-combination-operator and variational method. 摘要采用改进的线性组合算符和变分相结合的方法，导出了量子阱中强耦合极化子的振动频率和有效质量；
The results indicate: the effective mass of an acoustical polaron undergoes a sudden increasing when the e-p coupling constant achieves the critical value and then the self-trapping occurs. 结果表明:电子-声子耦合达到一定强度时声学极化子有效质量发生突变而使极化子自陷,声学极化子在二维系统中比三维条件下更容易自陷。
In the short term, the medicine may not be very effective. 从眼前来看，这药可能疗效不是很大。
Bismuth provides a very attractive model system for studying low-dimensional physical phenomena owing to the light effective masses, long mean free path and high carrier mobility. 铋因具有较小的有效质量、较长的电子自由程、较快的载流子移动速度而成为研究低维物理现象的理想体系。
When does the new system become effective? 新制度何时生效？