Microscopic symmetry properties of (001) Si/Ge monolayer superlattices

DOI to cite this document:: 10.5283/epub.9982

Eberl, Karl ; Wegscheider, Werner ; Schorer, R. ; Abstreiter, Gerhard

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Date of publication of this fulltext: 26 Oct 2009 13:27

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Abstract

Depending on the composition of [001] oriented short period SimGen superlattices (m monolayers Si/n monolayers Ge) there are six different space groups. In case of m+n odd the microscopic periodicity is doubled to 2(m+n) monolayers due to the tetrahedral bonding. We prepared several superlattices namely Si2Ge3, Si3Ge3 and Si4Ge6 with low temperature molecular beam epitaxy. Using selected area ...