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Symmetry properties of short period (001) Si/Ge superlattices

Eberl, Karl ; Wegscheider, Werner ; Abstreiter, Gerhard ; Cerva, H. ; Oppolzer, H.
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Date of publication of this fulltext: 26 Oct 2009 13:24


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 ...


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