Reference : Reconstructions and electronic structure of (11-22) and (11-2-2) semipolar AlN surfaces
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/18686
Reconstructions and electronic structure of (11-22) and (11-2-2) semipolar AlN surfaces
English
Kalesaki, Efterpi mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Lymperakis, Liverios [Max-Planck-Institut fur Eisenforschung > Computational Materials Design Department]
Kioseoglou, Joseph [Aristotle University of Thessaloniki > Department of Physics]
Neugebauer, Jorg [Max-Planck-Institut fur Eisenforschung > Computational Materials Design Department]
Karakostas, Theodoros [Aristotle University of Thessaloniki > Department of Physics]
Komninou, Philomela [Aristotle University of Thessaloniki > Department of Physics]
6-Jul-2012
Journal of Applied Physics
American Institute of Physics
112
033510
Yes (verified by ORBilu)
International
0021-8979
Melville
NY
[en] The energetics, atomic geometry, and electronic structure of semipolar (11-22) and (11-2-2) AlN surfaces are investigated employing first principles calculations. For metal-rich growth conditions, metallic reconstructions are favoured on both polarity surfaces. For N rich to moderate Al rich conditions, the (11-22) planes promote semiconducting reconstructions having 2 × 2 or c(2 × 2) periodicity. In contrast, under the particular range of the Al chemical potential the (11-2-2) surfaces stabilize reconstructions with excess metal and it is only at the extreme N rich limit that the semiconducting c(2 × 2) N adatom structure prevails. The present study reveals that the reconstructed (11-22) surfaces do not contain steps in contrast to (11-2-2) where surface steps are inherent for N rich to moderate metal rich growth conditions and may result in intrinsic step-flow growth and/or growth of parasitic semipolar orientations.
Aristotle University of Thessaloniki
European Commission - EC
DOTSENSE
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/10993/18686
10.1063/1.4743007
http://scitation.aip.org/content/aip/journal/jap/112/3/10.1063/1.4743007
FP7 ; 224212 - DOTSENSE - Group III-nitride quantum dots as optical transducers for chemical sensors

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