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Title: | Nucleation and growth of GaN nanorods on Si (111) surfaces by plasma-assisted molecular beam epitaxy - The influence of Si- and Mg-doping |
Author: | Furtmayr, Florian Vielemeyer, Martin Stutzmann, Martin Arbiol i Cobos, Jordi Estradé Albiol, Sònia Peiró Martínez, Francisca Morante i Lleonart, Joan Ramon Eickhoff, Martin |
Keywords: | Cristal·lografia Ciència dels materials Crystallography Materials scienc |
Issue Date: | 8-Aug-2008 |
Publisher: | American Institute of Physics |
Abstract: | The self-assembled growth of GaN nanorods on Si (111) substrates by plasma-assisted molecular beam epitaxy under nitrogen-rich conditions is investigated. An amorphous silicon nitride layer is formed in the initial stage of growth that prevents the formation of a GaN wetting layer. The nucleation time was found to be strongly influenced by the substrate temperature and was more than 30 min for the applied growth conditions. The observed tapering and reduced length of silicon-doped nanorods is explained by enhanced nucleation on nonpolar facets and proves Ga-adatom diffusion on nanorod sidewalls as one contribution to the axial growth. The presence of Mg leads to an increased radial growth rate with a simultaneous decrease of the nanorod length and reduces the nucleation time for high Mg concentrations. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.1063/1.2953087 |
It is part of: | Journal of Applied Physics, 2008, vol. 104, num. 3, p. 034309-1-034309-7 |
URI: | http://hdl.handle.net/2445/24892 |
Related resource: | http://dx.doi.org/10.1063/1.2953087 |
ISSN: | 0021-8979 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) |
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