Naslov
Self-assembling of Ge quantum dots in an alumina matrix

Autori
Buljan, Maja ; Pinto, Sara ; Rolo, Anabela Gomes ; Martín-Sánchez, Javier ; Gomes, Maria Jesus Matos ; Grenzer, Joerg ; Mücklich, Arndt ; Bernstorff, Sigrid ; Holý, Vaclav

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 82 (2010); 235407, 7

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Ge quantum dots ; self-assembly ; alumina ; GISAXS ; Monte-Carlo

Sažetak
In this work we report on a self-assembled growth of a Ge quantum dot lattice in a single 600-nm-thick Ge+Al2O3 layer during magnetron sputtering deposition of a Ge+Al2O3 mixture at an elevated substrate temperature. The self-assembly results in the formation of a well-ordered three-dimensional body-centered tetragonal quantum dot lattice within the whole deposited volume. The quantum dots formed are very small in size (less than 4.0 nm), have a narrow size distribution and a large packing density. The parameters of the quantum dot lattice can be tuned by changing the deposition parameters. The self-ordering of the quantum dots is explained by diffusion-mediated nucleation and surface-morphology effects and simulated by a kinetic Monte Carlo model.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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