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We have grown MnAs layers on GaAs(111)B substrates by molecular beam epitaxy and studied their morphology in situ by scanning tunneling microscopy. The surface was atomically flat with bilayer-steps and a (2×2) reconstruction on the terraces. Screw dislocations with associated growth spirals were observed. Positive and negative Burgers vectors were found with equal probability. We also observed steps...
During epitaxial growth of MnAs on GaAs(001) by molecular-beam epitaxy (MBE) the surface exhibits various reconstructions depending on the growth conditions. These reconstructions have been studied during growth by reflection high-energy electron diffraction (RHEED) and reflectance difference spectroscopy (RDS). A feature sensitive to the surface structure was identified in the RD spectra. After growth,...
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