Ion-beam-induced reconstruction of amorphous GaN

Kucheyev, S. O., Williams, J. S., Zou, J., Bradby, J. E., Jagadish, C. and Li, G. (2001) Ion-beam-induced reconstruction of amorphous GaN. Physical Review B, 63 11: 113202-1-113202-4. doi:10.1103/PhysRevB.63.113202

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Author Kucheyev, S. O.
Williams, J. S.
Zou, J.
Bradby, J. E.
Jagadish, C.
Li, G.
Title Ion-beam-induced reconstruction of amorphous GaN
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
Publication date 2001
Sub-type Article (original research)
DOI 10.1103/PhysRevB.63.113202
Open Access Status File (Publisher version)
Volume 63
Issue 11
Start page 113202-1
End page 113202-4
Total pages 4
Place of publication College Pk
Publisher American Physical Soc
Language eng
Abstract Wurtzite GaN can be rendered amorphous by high-dose heavy-ion bombardment. We show here that relatively low-dose reirradiation of such amorphous GaN (a-GaN) with MeV light ions can significantly change some of the physical properties of a-GaN. In particular, light-ion reirradiation of a-GaN results in (i) an increase in material density, (ii) the suppression of complete decomposition during postimplantation annealing, (iii) a significant increase in the values of hardness and Young's modulus, and (iv) an apparent decrease in the absorption of visible light. Transmission electronmicroscopy shows that a-GaN remains completely amorphous after light-ion reirradiation. Therefore, we attribute the above effects of light-ion reirradiation to an ion-beam-induced atomic-level reconstruction of the amorphous phase. Results indicate that electronic energy loss of light ions is responsible for the changes in the mechanical properties and for the suppression of thermally induced decomposition of a-GaN. However, the changes in the density of a-GaN appear to be controlled by the nuclear energy loss of light ions.
Keyword Physics, Condensed Matter
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Microscopy and Microanalysis Publications
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Citation counts: TR Web of Science Citation Count  Cited 13 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 17 Oct 2007, 10:27:06 EST