Nanograin formation of GaAs by high-pressure torsion

Yoshifumi Ikoma; Yoshimasa Ejiri; Kazunori Hayano; Katsuhiko Saito; Qixin Guo; Zenji Horita

doi:10.1080/09500839.2013.852265

Nanograin formation of GaAs by high-pressure torsion

Yoshifumi Ikoma, Yoshimasa Ejiri, Kazunori Hayano, Katsuhiko Saito, Qixin Guo, Zenji Horita

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

13 Citations (Scopus)

Abstract

Grain refinement of GaAs was achieved by application of severe plastic deformation through high-pressure torsion (HPT). Ultrafine-grained structures including nanograins were produced by the HPT processing under 24 GPa. An intense photoluminescence (PL) peak in the near infrared corresponding to the band gap of GaAs disappeared after the HPT processing but subsequent annealing gave rise not only to restoration of the original band-gap-related peak but also to an additional PL peak in the visible part of the spectrum on account of quantum confinement in the nanograins.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Philosophical Magazine Letters
Volume	94
Issue number	1
DOIs	https://doi.org/10.1080/09500839.2013.852265
Publication status	Published - Nov 20 2013

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1080/09500839.2013.852265

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title = "Nanograin formation of GaAs by high-pressure torsion",

abstract = "Grain refinement of GaAs was achieved by application of severe plastic deformation through high-pressure torsion (HPT). Ultrafine-grained structures including nanograins were produced by the HPT processing under 24 GPa. An intense photoluminescence (PL) peak in the near infrared corresponding to the band gap of GaAs disappeared after the HPT processing but subsequent annealing gave rise not only to restoration of the original band-gap-related peak but also to an additional PL peak in the visible part of the spectrum on account of quantum confinement in the nanograins.",

author = "Yoshifumi Ikoma and Yoshimasa Ejiri and Kazunori Hayano and Katsuhiko Saito and Qixin Guo and Zenji Horita",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific research from the JSPS Japan, on Innovative Areas {\textquoteleft}Bulk Nanostructured Metals{\textquoteright} Grant Nos. 22102004, 25102708.",

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AU - Ikoma, Yoshifumi

AU - Ejiri, Yoshimasa

AU - Hayano, Kazunori

AU - Saito, Katsuhiko

AU - Guo, Qixin

AU - Horita, Zenji

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific research from the JSPS Japan, on Innovative Areas ‘Bulk Nanostructured Metals’ Grant Nos. 22102004, 25102708.

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Nanograin formation of GaAs by high-pressure torsion

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