Nucleation of Ga droplets self-assembly on GaAs(111)A substrates

被引：8
|
作者：
Tuktamyshev, Artur [1 ,3 ]
Fedorov, Alexey [2 ,3 ]
Bietti, Sergio [1 ,3 ]
Vichi, Stefano [1 ,3 ]
Tambone, Riccardo [1 ,3 ]
Tsukamoto, Shiro [1 ,3 ]
Sanguinetti, Stefano [1 ,3 ]
机构：
[1] Univ Milano Bicocca, Dept Mat Sci, Via R Cozzi 55, I-20125 Milan, Italy
[2] CNR, Ist Foton & Nanotecnol, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy
[3] Polo Como, Lab Nanostruct Epitaxy & Spintron Silicon, Via F Anzani 42, I-22100 Como, Italy
来源：
SCIENTIFIC REPORTS | 2021年 / 11卷 / 01期
基金：
欧盟地平线“2020”;
关键词：
D O I：
10.1038/s41598-021-86339-3
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We investigated the nucleation of Ga droplets on singular GaAs(111)A substrates in the view of their use as the seeds for the self-assembled droplet epitaxial quantum dots. A small critical cluster size of 1-2 atoms characterizes the droplet nucleation. Low values of the Hopkins-Skellam index (as low as 0.35) demonstrate a high degree of a spatial order of the droplet ensemble. Around 350. C the droplet size distribution becomes bimodal. We attribute this observation to the interplay between the local environment and the limitation to the adatom surface diffusion introduced by the Ehrlich-Schwobel barrier at the terrace edges.
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收藏
页数：11
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