Persistent photoconductivity and electron density dependent magnetotransport measurements in narrow InGaAs/InP quantum wells
作者:
S. Mu¨ller,
J. Pillath,
W. Bauhofer,
A. Kohl,
K. Heime,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 67,
issue 11
页码: 1603-1605
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.114953
出版商: AIP
数据来源: AIP
摘要:
We have observed a significant persistent photoconductivity effect in narrow InGaAs/InP quantum wells grown by metalorganic vapor phase epitaxy. This effect enables a detailed study of transport parameters as a function of the electron density. In this way, the interface roughness scattering can be separated from the strongly density dependent Coulomb scattering. For different preparation conditions, we find a strong correlation between the amount of interface roughness scattering and structural data of the interface. The ratio of quantum to classical scattering times remains ≪1 even in the case when Coulomb scattering is not the predominant scattering mechanism. ©1995 American Institute of Physics.
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