Strain and correlation of self-organized Ge_(1-x)Mn_x nanocolumns embedded in Ge (001)

Abstract

We report on the structural properties of Ge_(1-x)Mn_x layers grown by molecular beam epitaxy. In these layers, nanocolumns with a high Mn content are embedded in an almost-pure Ge matrix. We have used grazing-incidence X-ray scattering, atomic force and transmission electron microscopy to study the structural properties of the columns. We demonstrate how the elastic deformation of the matrix (as calculated using atomistic simulations) around the columns, as well as the average inter-column distance can account for the shape of the diffusion around Bragg peaks.

arXiv comment9 pages, 7 figures

References in corpus (5)

• Clustering in a precipitate free GeMn magnetic semiconductor
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• Magnetic and structural properties of GeMn films: precipitation of intermetallic nanomagnets
• Precipitation of amorphous ferromagnetic semiconductor phase in epitaxially grown Mn-doped Ge thin films
• Exchange bias in GeMn nanocolumns: the role of surface oxidation

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