THE MONITORING OF 2D-3D TRANSITION FOR InAs/GaAs (001) SELF-ASSEMBLED QUANTUM DOTS BY ATOMIC FORCE MICROSCOPY
Journal Title: Journal of Science And Arts - Year 2008, Vol 9, Issue 2
Abstract
We present a detailed Atomic Force Microscopy study of InAs/GaAs (001) selfassembled quantum dots grown by Molecular Beam Epitaxy during its complete evolution cycle (transition from 2D islands to 3D islands). We have performed a statistical analysis regarding quantum dot number density identifying the existence of two separated distributions (for quasi-3D dots and 3D dots). We have observed that the density number value of quasi-3D QDs decreases from 1.1 x 10 cm to 4.3 x 10 cm for a coverage between 1.57 ML and 1.61 ML, while for 3D QDs it increases by a factor of 10 (from 2.1 x 1010 cm-2 to 2.3 x 1010 cm-2) so as the 3D QDs become the prevailed structures. We can assume as critical coverage, 1.59 ML.
Authors and Affiliations
Oana Bute, Valerica Gheoghe Cimpoca, Ernesto Placidi, Fabrizio Arciprete
Keywords
Related Articles
- EP ID EP91682
- DOI -
- Views 223
- Downloads 0
CHARACTERIZATION OF PARALLEL SURFACES TO S-α SURFACES IN HEISENBERG GROUP HEIS[sup]3[/sup]
In this paper, we study parallel surfaces to S-α surfaces according to Sabban frame in the Heisenberg group Heis[sup]3[/sup].
A PARALLEL SOLUTION OF TRIDIAGONAL LINEAR SYSTEMS BY CONTINUED FRACTIONS
In paper it is report the LU decomposition of tridiagonal matrix to evaluate continued fractions. Application of parallel suffix while applying parallel prefix products leads us to an optimal algorithm for LU decompositi...
COPPER IONS REMOVAL FROM ELECTROPLATING WASTEWATER USING NEW TYPE OF ION EXCHANGE MEMBRANES
In this paper the removal of copper ions from electroplating wastewater has been studied using a three-compartment electrodialysis cell of own construction device (made of PVC) and different type of acrylic ion-exchange...
VARIOUS SPACES FOR BANACH SPACE VALUED POTENTIAL HANKEL TRANSFORM
Different testing function spaces are defined for Banach space valued Potential –Hankel transform by using Gelfand-Shilov technique of Sα[sub][/sub] spaces, some properties of the spaces are also proved. At the end gener...
CONVEXITY AND LEAST SQUARE APPROXIMATION
In this paper we define the notion of n-m convexity and find the connection with n-order convex function defined by Tiberiu Popoviciu.