%0 Journal Article
%T Wetting layer evolution and its temperature dependence during self assembly of InAs/GaAs quantum dots
%A Hongyi Zhang
%A Yonghai Chen
%A Guanyu Zhou
%A Chenguang Tang
%A Zhanguo Wang
%J Physics
%D 2012
%I arXiv
%R 10.1186/1556-276X-7-600
%X For InAs/GaAs(001) quantum dot (QD) system, the wetting layer (WL) evolution and its temperature dependence were studied using reflectance difference spectroscopy (RDS) and analyzed with a rate equation model. The WL thicknesses showed a monotonic increase at relatively low growth temperatures but a first increase and then decrease at higher temperatures, which were unexpected from the thermodynamic understanding. By adopting a rate equation model, the temperature dependence of QD growth was assigned as the origin of different WL evolutions. A brief discussion on the indium desorption was also given. Those results gave hints of the kinetic aspects of QD self-assembly.
%U http://arxiv.org/abs/1205.0408v1