Martyna Justyna Grydlik, Moritz Brehm, Friedrich Schäffler,
"Morphological evolution of Ge/Si(001) quantum dot rings formed at the rim of wet-etched pits"
, in Nanoscale Research Letters, Vol. 7, Springer-Verlag, Seite(n) 1-6, 2012, ISSN: 1931-7573
Original Titel:
Morphological evolution of Ge/Si(001) quantum dot rings formed at the rim of wet-etched pits
Sprache des Titels:
Englisch
Original Kurzfassung:
We demonstrate the formation of Ge quantum dots in ring-like arrangements around predefined {111}-faceted pits in the Si(001) substrate. We report on the complex morphological evolution of the single quantum dots contributing to the rings by means of atomic force microscopy and demonstrate that by careful adjustment of the epitaxial growth parameters, such rings containing densely squeezed islands can be grown with large spatial distances of up to 5 ?m without additional nucleation of randomly distributed quantum dots between the rings.