EFFECTIVE-MASS APPROXIMATION IN GRADED CRYSTALS

被引：3

作者：

FU, Y

CHAO, KA

机构：

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1990年 / 4卷 / 15-16期

关键词：

D O I：

10.1142/S021797929000111X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effective mass approximation (EMA), when applied to graded crystals, needs a modified from [GRAHICS] for the kinetic energy operator, where 2-alpha + beta = -1 and m(z) is the position-dependent effective mass. We have analyzed the energy dispersion of the EMA Hamiltonian, and performed a one-dimensional and a three-dimensional exact calculation to determine the proper value of beta. Our conclusion is that when beta = -1 the EMA provides better agreement with the exact solutions.

引用

页码：2357 / 2369

页数：13