Atomic ordering of HCl-isopropanol (HCl-iPA) treated and vacuum annealed (100) InAs surfaces was studied by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and reflectance anisotropy spectroscopy (RAS). On the as-treated surface, a diffused (1 x 1) pattern is observed, which successively evolves to the beta(2)(2 x 4)/c(2 x 8) and (4 x 2)/c(8 x 2) ones after annealing to 330degreesC and 410degreesC respectively. At the intermediate temperature of 370degreesC, an alpha(2)(2 x 4)/(4 x 2) mixed reconstruction is observed. Reflectance anisotropy spectra are compared with those of the corresponding reconstructions observed after As-decapping and found to be quite similar. Therefore we conclude that high-quality (100) InAs surfaces can be obtained by wet chemical treatment in an easy, inexpensive and practical way. (C) 2004 Elsevier B.V. All rights reserved.

Well-ordered (100) InAs surfaces using wet chemical treatments / Tereshchenko, O. E.; Placidi, E.; Paget, D.; Chiaradia, P.; Balzarotti, A.. - In: SURFACE SCIENCE. - ISSN 0039-6028. - 570:3(2004), pp. 237-244. [10.1016/j.susc.2004.07.047]

Well-ordered (100) InAs surfaces using wet chemical treatments

Placidi E.
Secondo
;
2004

Abstract

Atomic ordering of HCl-isopropanol (HCl-iPA) treated and vacuum annealed (100) InAs surfaces was studied by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and reflectance anisotropy spectroscopy (RAS). On the as-treated surface, a diffused (1 x 1) pattern is observed, which successively evolves to the beta(2)(2 x 4)/c(2 x 8) and (4 x 2)/c(8 x 2) ones after annealing to 330degreesC and 410degreesC respectively. At the intermediate temperature of 370degreesC, an alpha(2)(2 x 4)/(4 x 2) mixed reconstruction is observed. Reflectance anisotropy spectra are compared with those of the corresponding reconstructions observed after As-decapping and found to be quite similar. Therefore we conclude that high-quality (100) InAs surfaces can be obtained by wet chemical treatment in an easy, inexpensive and practical way. (C) 2004 Elsevier B.V. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/1327249
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