LEVINSON THEOREM IN A SEMICONDUCTOR QUANTUM-WELL

被引:6
|
作者
MILANOVIC, V [1 ]
IKONIC, Z [1 ]
TJAPKIN, D [1 ]
机构
[1] HIGH TECH PTT SCH, YU-11000 BELGRADE, YUGOSLAVIA
关键词
D O I
10.1016/0375-9601(92)90785-K
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The relation between the phase shift of zero energy continuous spectrum wavefunctions and the number of bound states in a symmetric semiconductor quantum well is discussed. In the case of nonuniform effective mass, Levinson's theorem is shown to be valid in its usual form. However, in the high-energy range the phase shift tends to infinity, oscillating about a straight line, very different from the case of constant effective mass, where it tends to zero. Numerical calculations are given for a rectangular quantum well.
引用
收藏
页码:127 / 129
页数:3
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