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Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2003

Spontaneous structural pattern formation at the nanometre scale in kinetically restricted homoepitaxy on vicinal surfaces

Résumé

The concept of spontaneous pattern formation in epitaxial growth is currently actively explored as a promising pathway for lateral nanostructuring of surfaces. Often, the origin of self-organization is traced back to the presence of an excess energy barrier for adatom diffusion associated with asymmetric features in the crystalline structure, the Ehrlich–Schw¨obel barrier. Upon growth of Cu on vicinal Cu surfaces at moderate substrate temperatures a step-meandering instability develops, resulting in an in-plane patterning of the surfaces at the nanometre scale with a temperature- and flux-dependent characteristic wavelength. This meandering instability is superseded by a step-bunching instability during growth at higher temperatures. Specifically, the meandering instability acts as a precursor to the bunching instability, indicating that a onedimensional treatment of bunching in step flow growth is not sufficient. These nanostructured surfaces might be used as templates in order to guide the growth of materials which do not show spontaneous self-organization.
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Dates et versions

hal-04329627 , version 1 (07-12-2023)

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N Néel, T Maroutian, Ludovic Douillard, H-J Ernst. Spontaneous structural pattern formation at the nanometre scale in kinetically restricted homoepitaxy on vicinal surfaces. Journal of Physics: Condensed Matter, 2003, 15 (47), pp.S3227-S3240. ⟨10.1088/0953-8984/15/47/003⟩. ⟨hal-04329627⟩
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