Manipulating surface diffusion and elastic interactions to obtain quantum dot multilayer arrangements over different length scales

Data di pubblicazione: 15 Set 2014

RivistaFonte dati: OPENALEXTipo OpenAlex: articleOpen Access
Autori: Mario Scuderi, Ernesto Placidi, F. Arciprete, V. Latini, Simone Latini, Rita Magri, M. Scuderi, Giuseppe Nicotra, Fulvia Patella

An innovative multilayer growth of InAs quantum dots on GaAs(100) is demonstrated to lead to self-aggregation of correlated quantum dot chains over mesoscopic distances. The fundamental idea is that at critical growth conditions is possible to drive the dot nucleation only at precise locations corresponding to the local minima of the Indium chemical potential. Differently from the known dot multilayers, where nucleation of new dots on top of the buried ones is driven by the surface strain originating from the dots below, here the spatial correlations and nucleation of additional dots are mostly dictated by a self-engineering of the surface occurring during the growth, close to the critical conditions for dot formation under the fixed oblique direction of the incoming As flux, that drives the In surface diffusion.

Editore
AIP Publishing LLC
Fonte
Applied Physics Letters
Volume
105
Fascicolo
11
Citazioni
13
ID archivio
63796f5913c78e7e4f5e3dffd0d5568e
Riferimenti
Volume: 105 Issue: 11 Pages: 111905