DEFINITIVE IDENTIFICATION OF D- CENTERS IN GAAS QUANTUM-WELLS BY TILT-INDUCED LINE SPLITTING IN A MAGNETIC-FIELD

被引：70

作者：

MUELLER, ER ^{[1
]}

LARSEN, DM ^{[1
]}

WALDMAN, J ^{[1
]}

GOODHUE, WD ^{[1
]}

机构：

[1] MIT, LINCOLN LAB, LEXINGTON, MA 02173 USA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.68.2204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

D- centers have been unambiguously identified in GaAs/(Ga,Al)As quantum wells by analysis of the dependence of the observed photoconductivity spectrum on the applied magnetic field and sample orientation. Theoretical investigations show that in magnetic fields of interest the D- transitions do not involve photoionization of the centers as has been previously supposed but proceed from the ground state to discrete p - 1- or p + 1-like D- levels, which lie above the N = 0 and N = 1 Landau-level energies, respectively. Tilting the sample leads to a predicted anticrossing of discrete p0- and p + 1-like D- levels. Excellent agreement with experiment is obtained without any adjustable parameters.

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页码：2204 / 2207

页数：4

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