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HEAVILY Si-DOPED AlAs FILMS GROWN BY MOLECULAR BEAM EPITAXY

Published online by Cambridge University Press:  28 February 2011

K. KOBAYASHI ,
N. KAMATA  and
T. SUZUKI
K. KOBAYASHI
Affiliation:
Science and Technical Research Laboratories of NHK (Japan Broadcasting Corp.) 1-10-11 Kinuta, Setagaya-ku, Tokyo 157, Japan
N. KAMATA
Affiliation:
Science and Technical Research Laboratories of NHK (Japan Broadcasting Corp.) 1-10-11 Kinuta, Setagaya-ku, Tokyo 157, Japan
T. SUZUKI
Affiliation:
Science and Technical Research Laboratories of NHK (Japan Broadcasting Corp.) 1-10-11 Kinuta, Setagaya-ku, Tokyo 157, Japan
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Abstract

Heavily Si-doped aluminium arsenide films on GaAs substrate by MBE have been investigated. It is found that the Si activation energy ED for AlAs films decreases with increasing Si donor concentration, approaching a few meV for n≧3×l018. The maximum free electron concentration of n=7×l018 cm−3 and electron mobility of 200 cm2/V.sec for n=5×l017 were obtained. It is also shown that the replacement of the ternary AlxGal−xAs with a superlattice having heavily Si-doped binary AlAs in the barrier layers is effective to increase free carrier concentration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 56: Symposium H – Layered Structures and Epitaxy , 1985 , 61
Copyright
Copyright © Materials Research Society 1986

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