Implantation-induced disorder in amorphous Ge : Production and relaxation
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 21-25 |
Journal / Publication | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
Volume | 175-177 |
Publication status | Published - Apr 2001 |
Externally published | Yes |
Conference
Title | 12th International Conference on Ion Beam Modification of Materials |
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Place | Brazil |
City | Rio Grande do Sul |
Period | 3 - 8 September 2000 |
Link(s)
Abstract
Extended X-ray absorption fine structure and Raman spectroscopy have been utilised to measure implantation-induced micro-structural modifications in amorphous Ge including increases in bond length, broadening of the bond-angle distribution, and non-Gaussian static disorder as functions of ion dose. The resulting evolution of the inter-atomic distance distribution, over an ion dose range extending two orders of magnitude beyond that required for amorphisation, demonstrates the influence of implant conditions on amorphous phase structure. Results are attributed to increased fractions of three- and fivefold coordinated atoms as a means of accommodating implantation-induced point defects in the amorphous phase. In contrast, a common, ion-dose-independent structure is apparent following low-temperature, thermally-induced relaxation as consistent with the annealing of point defects in the amorphous phase. Structural relaxation is manifested by reductions in both bond-length and bond-angle distortion and the relaxation enthalpy for each component has been calculated separately. © 2001 Elsevier Science B.V.
Research Area(s)
- Amorphous, EXAFS, Ge, Implantation, Raman
Citation Format(s)
Implantation-induced disorder in amorphous Ge: Production and relaxation. / Ridgway, M. C.; Glover, C. J.; Desnica-Frankovic, I. D. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 175-177, 04.2001, p. 21-25.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 175-177, 04.2001, p. 21-25.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review