Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate

Taizo Nakasu; Takeru Kizu; Sotaro Yamashita; Takayuki Aiba; Shota Hattori; Wei Che Sun; Kosuke Taguri; Fukino Kazami; Yuki Hashimoto; Shun Ozaki; Masakazu Kobayashi; Toshiaki Asahi

doi:10.1007/s11664-016-4386-8

Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate

Taizo Nakasu^*, Takeru Kizu, Sotaro Yamashita, Takayuki Aiba, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Yuki Hashimoto, Shun Ozaki, Masakazu Kobayashi, Toshiaki Asahi

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

ZnTe/sapphire heterostructures were focused, and ZnTe thin films were prepared on highly mismatched sapphire substrates by molecular beam epitaxy. A sapphire substrate possessing an atomically-smooth step-terrace structure was used to improve the crystallinity and morphology of the produced ZnTe film. The growth mode of the ZnTe thin film on a sapphire substrate with an atomically-smooth step-terrace structure was found to shift to a two-dimensional growth mode, and a ZnTe thin film possessing a flat surface was obtained. The crystallographic properties of the ZnTe film suggested that the resulting layer consisted of a single (111)-oriented domain. The photoluminescence property was also improved, and the interface lattice alignment between the ZnTe and sapphire was also affected by the atomically-smooth step-terrace structure.

Original language	English
Pages (from-to)	2127-2132
Number of pages	6
Journal	Journal of Electronic Materials
Volume	45
Issue number	4
DOIs	https://doi.org/10.1007/s11664-016-4386-8
Publication status	Published - 2016 Apr 1

Keywords

Sapphire
molecular beam epitaxy
step-terrace structure
x-ray diffraction
zinc telluride

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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10.1007/s11664-016-4386-8

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Nakasu, T., Kizu, T., Yamashita, S., Aiba, T., Hattori, S., Sun, W. C., Taguri, K., Kazami, F., Hashimoto, Y., Ozaki, S., Kobayashi, M., & Asahi, T. (2016). Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate. Journal of Electronic Materials, 45(4), 2127-2132. https://doi.org/10.1007/s11664-016-4386-8

Nakasu, T, Kizu, T, Yamashita, S, Aiba, T, Hattori, S, Sun, WC, Taguri, K, Kazami, F, Hashimoto, Y, Ozaki, S, Kobayashi, M & Asahi, T 2016, 'Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate', Journal of Electronic Materials, vol. 45, no. 4, pp. 2127-2132. https://doi.org/10.1007/s11664-016-4386-8

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abstract = "ZnTe/sapphire heterostructures were focused, and ZnTe thin films were prepared on highly mismatched sapphire substrates by molecular beam epitaxy. A sapphire substrate possessing an atomically-smooth step-terrace structure was used to improve the crystallinity and morphology of the produced ZnTe film. The growth mode of the ZnTe thin film on a sapphire substrate with an atomically-smooth step-terrace structure was found to shift to a two-dimensional growth mode, and a ZnTe thin film possessing a flat surface was obtained. The crystallographic properties of the ZnTe film suggested that the resulting layer consisted of a single (111)-oriented domain. The photoluminescence property was also improved, and the interface lattice alignment between the ZnTe and sapphire was also affected by the atomically-smooth step-terrace structure.",

keywords = "Sapphire, molecular beam epitaxy, step-terrace structure, x-ray diffraction, zinc telluride",

author = "Taizo Nakasu and Takeru Kizu and Sotaro Yamashita and Takayuki Aiba and Shota Hattori and Sun, {Wei Che} and Kosuke Taguri and Fukino Kazami and Yuki Hashimoto and Shun Ozaki and Masakazu Kobayashi and Toshiaki Asahi",

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AU - Aiba, Takayuki

AU - Hattori, Shota

AU - Sun, Wei Che

AU - Taguri, Kosuke

AU - Kazami, Fukino

AU - Hashimoto, Yuki

AU - Ozaki, Shun

AU - Kobayashi, Masakazu

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N2 - ZnTe/sapphire heterostructures were focused, and ZnTe thin films were prepared on highly mismatched sapphire substrates by molecular beam epitaxy. A sapphire substrate possessing an atomically-smooth step-terrace structure was used to improve the crystallinity and morphology of the produced ZnTe film. The growth mode of the ZnTe thin film on a sapphire substrate with an atomically-smooth step-terrace structure was found to shift to a two-dimensional growth mode, and a ZnTe thin film possessing a flat surface was obtained. The crystallographic properties of the ZnTe film suggested that the resulting layer consisted of a single (111)-oriented domain. The photoluminescence property was also improved, and the interface lattice alignment between the ZnTe and sapphire was also affected by the atomically-smooth step-terrace structure.

AB - ZnTe/sapphire heterostructures were focused, and ZnTe thin films were prepared on highly mismatched sapphire substrates by molecular beam epitaxy. A sapphire substrate possessing an atomically-smooth step-terrace structure was used to improve the crystallinity and morphology of the produced ZnTe film. The growth mode of the ZnTe thin film on a sapphire substrate with an atomically-smooth step-terrace structure was found to shift to a two-dimensional growth mode, and a ZnTe thin film possessing a flat surface was obtained. The crystallographic properties of the ZnTe film suggested that the resulting layer consisted of a single (111)-oriented domain. The photoluminescence property was also improved, and the interface lattice alignment between the ZnTe and sapphire was also affected by the atomically-smooth step-terrace structure.

KW - Sapphire

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KW - x-ray diffraction

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Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate

Abstract

Keywords

ASJC Scopus subject areas

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