LOW-TEMPERATURE MAGNETOPHOTOLUMINESCENCE INVESTIGATIONS OF THE 2D HOLE SYSTEM IN P-TYPE GAAS-ALGAAS HETEROJUNCTIONS

被引：4

作者：

DAVIES, AG

MITCHELL, EE

CLARK, RG

SIMMONDS, PE

SILVER, TM

RITCHIE, DA

FROST, JEF

PEPPER, M

JONES, GAC

机构：

[1] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

[2] UNIV WOLLONGONG,DEPT PHYS,WOLLONGONG,NSW 2500,AUSTRALIA

来源：

PHYSICA B | 1994年 / 201卷

关键词：

D O I：

10.1016/0921-4526(94)91123-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Bandgap magneto-photoluminescence (PL) has been used to investigate the optical signature of high quality p-type GaAs-Al(x)Ga1-xAs single heterojunction samples in the quantum Hall effect (QHE) regime. The PL spectra show a series of sharp lines, with a number of bulk features attributed to free exciton emission and acceptor-related bound excitons evident. Significantly, however, one line within the complex PL spectrum, at slightly lower energy to the free exciton, becomes a dominant feature at low temperatures and has an intensity maximum which exhibits superlinear behaviour with excitation power that correlates with the nu = 1 QHE. This line is assigned to an excitonic process at the heterointerface reminiscent of 2D excited subband recombination in n-type structures.

引用

收藏

页码：397 / 402

页数：6

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