Selenium-treated GaAs(001)-2×3 surface studied by scanning tunneling microscopy
Author(s) -
Hidemi Shigekawa,
Haruhiro Oigawa,
Koji Miyake,
Yoshiaki Aiso,
Yasuo Nannichi,
Tomihiro Hashizume,
Тошио Сакурай
Publication year - 1994
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.112246
Subject(s) - scanning tunneling microscope , dimer , surface structure , materials science , surface reconstruction , microscopy , gallium arsenide , crystallography , quantum tunnelling , surface (topology) , condensed matter physics , chemistry , nanotechnology , optics , optoelectronics , physics , geometry , mathematics , organic chemistry
An Se-passivated GaAs(001) surface was found to be stabilized by 2×3 reconstruction, previously reported as an intermediate structure, under the condition of a low Se chemical potential. Ordered elliptical protrusions with ~0.6-nm periodicity in the [110] direction were observed by scanning tunneling microscopy, the structure of which was in good agreement with a double-layered dimer model. A comprehensive model to explain the 2×3 structure together with the formation of a Ga2Se3-like structure with ordered 1/3 ML Ga vacancies was proposed
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