SURFACE-STATES OF A SEMI-INFINITE SUPERLATTICE

被引：33
|
作者：
BLOSS, WL
机构：
[1] Electronics Technology Center, Aerospace Corporation, Los Angeles, CA 90009
来源：
PHYSICAL REVIEW B | 1991年 / 44卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.44.8035
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The surface states of a semi-infinite superlattice with a step discontinuity in the potential at the interface has been calculated within the framework of the Kronig-Penney model. An explicit solution is obtained for the eigenenergy of the surface state. Surface states are shown to exist only for certain values of the barrier widths and/or heights of the semi-infinite superlattice and of the potential step discontinuity at the interface. Approximate, but very accurate, formulas are derived for the surface-state energy and its respective characteristic decay length, allowing one to readily determine the conditions for the existence of surface states.
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页码：8035 / 8042
页数：8
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