Twins and their boundaries during homoepitaxy on Ir(111)

Details Twins and their boundaries during homoepitaxy on Ir(111) Twins and their boundaries during homoepitaxy on Ir(111)

2010-06-14

arxiv.org/abs/1006.2748v1

Physics

Condensed Matter

Materials Science

13 pages, 11 figures

Scientific paper

The growth and annealing behavior of strongly twinned homoepitaxial films on Ir(111) has been investigated by scanning tunneling microscopy, low energy electron diffraction and surface X-ray diffraction. In situ surface X-ray diffraction during and after film growth turned out to be an efficient tool for the determination of twin fractions in multilayer films and to uncover the nature of side twin boundaries. The annealing of the twin structures is shown to take place in a two step process, reducing first the length of the boundaries between differently stacked areas and only then the twins themselves. A model for the structure of the side twin boundaries is proposed which is consistent with both the scanning tunneling microscopy and surface X-ray diffraction data.

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