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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
