Enhanced surface diffusion in forming ion-beam-induced nanopatterns on Si (0 0 1)

Banerjee, R. ; Hazra, S. ; Sanyal, M. K. (2008) Enhanced surface diffusion in forming ion-beam-induced nanopatterns on Si (0 0 1) Journal of Physics D: Applied Physics, 41 (5). 055306_1-055306_4. ISSN 0022-3727

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Official URL: http://iopscience.iop.org/0022-3727/41/5/055306

Related URL: http://dx.doi.org/10.1088/0022-3727/41/5/05530

Abstract

The diffusion process on Si (0 0 1) in the presence of a 5 keV Ar+ ion beam has been investigated by monitoring initiation of ripple-pattern formation. The morphology of the surface obtained by scanning tunnelling microscopy measurements in ultrahigh vacuum were characterized using the height-difference correlation function. These measurements clearly show formation of nanostructured ripple patterns having wavelength ~60 nm and height ~0.32 nm at 200°C. The results demonstrate that ion beam induced and thermal diffusions cannot be treated as additive processes and the observed enhancement of surface diffusion requires lowering of activation energy that arises due to creation of ion-beam induced vacant regions.

Item Type:Article
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ID Code:83155
Deposited On:17 Feb 2012 04:24
Last Modified:17 Feb 2012 04:24

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