THEORY OF NEGATIVE DIFFERENTIAL CONDUCTIVITY IN A SUPERLATTICE MINIBAND

被引：162

作者：

LEI, XL ^{[1
]}

HORING, NJM ^{[1
]}

CUI, HL ^{[1
]}

机构：

[1] STEVENS INST TECHNOL LIB,DEPT PHYS & ENGN PHYS,HOBOKEN,NJ 07030

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.66.3277

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Bloch electron conductivity perpendicular to the layers of a superlattice (period d) is evaluated using an extension of the balance-equation approach [X. L. Lei and C. S. Ting, Phys. Rev. B 32, 1112 (1985)] to narrow-band transport. The perpendicular peak drift velocity upsilon-p and the critical field E(c), at which the drift velocity peaks, are analyzed as functions of miniband width. Our theoretical prediction that E(c)d increases with decreasing miniband width agrees well with the data of Sibille et al. [Phys. Rev. Lett. 64, 52 (1990)], even for the samples of narrowest miniband width in their experiment.

引用

页码：3277 / 3280

页数：4

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