Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9572456 | Applied Surface Science | 2005 | 9 Pages |
Abstract
This paper, being a complementary one to our earlier report (Chem. Phys. Lett. 387 (2004) 110), presents a detailed description of the surface cleaning method applied for molecular beam epitaxy (MBE)-grown zinc-blende (zb)-MnTe epilayers. In particular, surface compositional changes induced by multistep Ar+ ion sputtering (with beam energy, Ei, fixed between 0.5 and 2.0 keV) and subsequent annealing of zb-MnTe crystal have been studied by using X-ray photoelectron spectroscopy (XPS). It was found that Ar+ ion bombardment with Ei = 1.5 keV appeared as the crucial preparation step (either in multistep- or in post-anneal sputtering), which provided an efficient removal of the surface oxides and contaminants and led to nearly stoichiometric surface composition, namely [Te]/[Mn] = 0.97. Detailed analysis of the Mn 2p core-level spectrum (acquired in Mg Kα mode) for clean zb-MnTe surface exhibited good consistency with the results of the relevant analysis reported earlier (see the reference above).
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
R.J. Iwanowski, M.H. Heinonen, E. Janik,