THE NEGATIVE DIFFERENTIAL EFFECT IN A SEMICONDUCTOR SUPERLATTICE IN THE PRESENCE OF AN EXTERNAL ELECTRIC-FIELD

被引：6
|
作者：
MENSAH, SY
机构：
[1] Dept. of Phys., Univ. of Cape Coast
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 22期
关键词：
D O I：
10.1088/0953-8984/4/22/001
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Boltzmann's equation is solved for an electron in the lowest miniband of a superlattice semiconductor under the influence of an external electric field E(t). Thc current-density electric field characteristic shows a negative differential conductivity when omega-tau much less than 1 (quasi-static case). This occurs in the neighbourhood where the constant electric fleld E0 is equal to the amplitude of the AC electric field E1 and the peak decreases with increasing E1.
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页码：L325 / L329
页数：5
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