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Interfacial Superstructures Studied by Grazing Incidence X-Ray Diffraction

Published online by Cambridge University Press:  25 February 2011

Koichi Akimoto,
Jun'Ichiro Mizuki,
Ichiro Hirosawa and
Junji Matsui
Koichi Akimoto
Affiliation:
Fundamental Research Laboratories, NEC Corporation 34, Miyukigaoka, Tsukuba, Ibaraki 305, Japan
Jun'Ichiro Mizuki
Affiliation:
Fundamental Research Laboratories, NEC Corporation 34, Miyukigaoka, Tsukuba, Ibaraki 305, Japan
Ichiro Hirosawa
Affiliation:
Fundamental Research Laboratories, NEC Corporation 34, Miyukigaoka, Tsukuba, Ibaraki 305, Japan
Junji Matsui
Affiliation:
Fundamental Research Laboratories, NEC Corporation 34, Miyukigaoka, Tsukuba, Ibaraki 305, Japan
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Abstract

Surface superstructures (reconstructed structures) have been observed by many authors. However, it is not easy to confirm that a superstructure does exist at an interface between two solid layers. The present paper reports a direct observation, by a grazing incidence x-ray diffraction technique with use of synchrotron radiation, of superstructures at the interface. Firstly, the boron-induced R30° reconstruction at the Si interface has been investigated. At the a Si/Si(111) interface, boron atoms at 1/3 ML are substituted for silicon atoms, thus forming a R30° lattice. Even at the interface between a solid phase epitaxial Si(111) layer and a Si(111) substrate, the boron-induced R30° reconstruction has been also observed. Secondly, SiO2/Si(100)-2×l interfacial superstructures have been investigated. Interfacial superstructures have been only observed in the samples of which SiO2 layers have been deposited with a molecular beam deposition method. Finally, the interfaces of MOCVD-grown AIN/GaAs(100) have been shown to have 1×4 and 1×6 superstructures.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 159: Symposium C – Atomic Scale Structure of Interfaces , 1989, 303
Copyright
Copyright © Materials Research Society 1990

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References

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