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Geometric Scaling of Stripe Modulations in BCC Cu Thin Films on Ag(100)

Pfeifer, MA; Robach, O; Ocko, BM; Robinson, I; (2004) Geometric Scaling of Stripe Modulations in BCC Cu Thin Films on Ag(100). Physica B: Condensed Matter , 357 152 - 158.

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Abstract

Copper and silver have a sufficiently large mismatch of lattice parameters that the growth of Cu on Ag(1 0 0) substrates stabilizes the metastable body-centered cubic (BCC) form of Cu. This paper reports that layer-by-layer growth of the BCC film occurs up to a critical thickness of 10 ML, beyond which a structural instability arises in the thin film. This leads to a uniaxial laterally modulated phase giving rise to satellite peaks in the diffraction from both film and substrate. The characteristic dependence of satellite spacing versus film thickness is interpreted in terms of four possible variants of the modulated film structure. Only one of these variants is consistent with the observed growth behavior.

Type:Article
Title:Geometric Scaling of Stripe Modulations in BCC Cu Thin Films on Ag(100)
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology

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