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Atomic and electronic structure of Bi/GaAs(001)-alpha 2(2x4)
Date
2008-07-02
Author
Usanmaz, D.
ÇAKMAK, MELEK
Ellialtıoğlu, Süleyman Şinasi
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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We report an ab initio pseudopotential calculation for the atomic and electronic structure of Bi/GaAs(001)-alpha 2(2 x 4). Three structural models with Bi coverages of Theta = 1/4 are considered, containing one Bi dimer or two Bi-As mixed dimers. According to our calculations for this coverage, the atomic model of the Bi/GaAs(001)-(2 x 4) reconstruction is similar to the alpha 2 structure of the clean GaAs(001)-(2 x 4) surface in which the top As dimer is replaced by a Bi dimer. This result is in agreement with the most recent scanning tunneling microscopy work.
Subject Keywords
General Materials Science
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/57831
Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
DOI
https://doi.org/10.1088/0953-8984/20/26/265003
Collections
Graduate School of Natural and Applied Sciences, Article