DENSITY DEPENDENCE OF NONRESONANT TUNNELING IN ASYMMETRIC COUPLED QUANTUM-WELLS

被引：19
作者：
LEVI, DH
WAKE, DR
KLEIN, MV
KUMAR, S
MORKOC, H
机构：
[1] UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801
[2] UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
[3] UNIV ILLINOIS,COORDINATED SCI LAB,URBANA,IL 61801
来源：
PHYSICAL REVIEW B | 1992年 / 45卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.45.4274
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have measured tunneling rates in a series of asymmetric coupled quantum wells as a function of the barrier thickness and carrier density between confined levels in which optical-phonon-assisted tunneling is energetically forbidden. Our measurements have demonstrated a strong density dependence of the tunneling rates. The measured dependence is qualitatively consistent with a model of excitons diffusing to a limited number of extrinsic tunneling sites.
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页码：4274 / 4279
页数：6
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