TITLE

Periodic supply of indium as surfactant for N-polar InN growth by plasma-assisted molecular-beam epitaxy

AUTHOR(S)
Yong-Zhao Yao; Sekiguchi, Takashi; Ohgaki, Takeshi; Adachi, Yutaka; Ohashi, Naoki; Okuno, Hanako; Takeguchi, Masaki
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p041913
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have investigated the self-surfactant effect of In for N-polar InN growth by plasma-assisted molecular-beam epitaxy. We found that InN quality was significantly improved if a thin In coverage (about 1.8 ML) was introduced before InN growth. However, this In coverage was slowly consumed during subsequent InN growth under N-rich condition. Periodically restoring In coverage for thick InN growth was proposed to solve this consumption problem. We suggest that the effect of In surfactant is to terminate the surface N dangling bonds and form an In adlayer, under which an efficient diffusion channel for lateral N adatom transport is created.
ACCESSION #
43494197

 

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