Affordable Access

Positioning of strained islands by interaction with surface nanogrooves

American Physical Society
Publication Date
  • Qc Physics
  • Physics


When strained Stranski-Krastanow islands are used as “self-assembled quantum dots,” a key goal is to control the island position. Here we show that nanoscale grooves can control the nucleation of epitaxial Ge islands on Si(001), and can drive lateral motion of existing islands onto the grooves, even when the grooves are very narrow and shallow compared to the islands. A position centered on the groove minimizes energy. We use as prototype grooves the trenches which form naturally around islands. During coarsening, the shrinking islands move laterally to sit directly astride that trench. In subsequent growth, we demonstrate that islands nucleate on the “empty trenches” which remain on the surface after complete dissolution of the original islands.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times

More articles like this

Positioning of strained islands by interaction wit...

on Physical Review Letters Aug 29, 2008

Energies of strained surfaces and barrierless form...

on Physical Review Letters Aug 29, 2003

Growth and properties of small Co islands on a str...

on Journal of Magnetism and Magne... Jan 01, 2003
More articles like this..