DENSITY OF STATES AND WANNIER-STARK LEVELS OF SUPERLATTICES IN AN ELECTRIC-FIELD

被引：25

作者：

RITZE, M ^{[1
]}

HORING, NJM ^{[1
]}

ENDERLEIN, R ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.47.10437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The density of states is calculated for superlattices in the presence of an electric field, using the concept of a generalized transmission probability. Various Ga1-xAlxAs-based quantum-well structures with up to 200 periods are examined for electric fields ranging from 4 X 10(2) V/CM to 1 X 10(6) V/CM. Different field effects are observed in the below- and above-barrier regions of the density-of-states spectra. In the below-barrier region the spectra embody the occurrence of Wannier-Stark localization. The above-barrier region is dominated by two kinds of structures, one similar to Franz-Keldysh oscillations, and another resembling a Wannier-Stark-ladder behavior.

引用

页码：10437 / 10445

页数：9

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